A leaf spring tread metal elastic planet wheel

Abstract

The present invention discloses a leaf spring tread metal elastic planet wheel, which comprises: a wheel hub, and an installation position ring plate is arranged on the outer peripheral side of the wheel hub; leaf spring tread plates, the leaf spring tread plates are all arc-shaped plates and are arranged in pairs relatively to form a shuttle-shaped wheel surface unit, a plurality of the wheel surface units are circumferentially arranged and connected to form a tire, the inner leaf spring tread plate of the wheel surface unit corresponding to the tire is fixedly connected to the installation position ring plate, the outer leaf spring tread plate of the wheel surface unit corresponding to the tire contacts with the lunar soil, and the relatively arranged leaf spring tread plates in pairs elastically deform to adapt to complex lunar soil terrains. The structure of the present invention is simple, effectively disperses impact loads, provides elastic support simultaneously through the inner and outer leaf spring tread plates, improves the radial deformation ability of the wheel while ensuring the bearing capacity, and improves the driving smoothness of the wheel.

Description

Technical Field

[0001] The present invention belongs to the technical field of deep space exploration equipment, and particularly relates to a leaf spring tread metal elastic planetary wheel. Background Art

[0002] With the continuous progress of China's aerospace technology, various deep space exploration projects are gradually carried out. The driving ability of the exploration vehicle on the lunar soil is a key factor determining the quality of the exploration mission. Elastic metal wheels can absorb vibrations due to the elastic deformation of the wheels, and have the advantages of buffering, shock absorption, and high passability, and can better adapt to complex terrain environments. The elastic unit processing technology of leaf spring type elastic metal wheels is simple and has developed vigorously in recent years; the elastic deformation ability of a single leaf spring element is limited by the thickness of the leaf spring material, and the reduction of the thickness will lead to a decrease in the load-bearing capacity. The ways of obtaining load-bearing and elasticity are contradictory, making it difficult for leaf spring type elastic wheels to have sufficient strength and stiffness while providing enough elastic deformation space to avoid plastic failure caused by large deformation of the elastic element; therefore, research on leaf spring type wheels with both rigidity and elasticity needs to be carried out.

[0003] Therefore, how to provide a leaf spring tread metal elastic planetary wheel is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a leaf spring tread metal elastic planetary wheel to solve the stress concentration phenomenon on both sides of the tread of the elastic tread metal wheel.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: A leaf spring tread metal elastic planetary wheel, which comprises:

[0006] A hub, and an installation position ring plate is arranged on the outer peripheral side of the hub;

[0007] Tread leaf springs, the tread leaf springs are all arc-shaped plates and are arranged in pairs relatively to form a shuttle-shaped wheel surface unit, a plurality of the wheel surface units are connected circumferentially to form a tire, the inner tread leaf spring of the wheel surface unit corresponding to the tire is fixedly connected to the installation position ring plate, and the outer tread leaf spring of the wheel surface unit corresponding to the tire contacts the lunar soil, and the paired tread leaf springs elastically deform relatively to adapt to the complex lunar soil terrain.

[0008] The beneficial effects of the present invention are as follows: The tire adopts metal spring plates, which have high wear resistance and can avoid damage and wear of the wheels caused by rigid impacts. The tire is installed on the wheel hub. Since both the inner tread and the outer tread of the tire are spring plates, they can elastically deform inward simultaneously. That is to say, when the tire contacts the starlit soil, the inner and outer treads can elastically deform simultaneously, with strong buffering ability and good passability to adapt to complex starlit soil conditions. The entire tire is composed of multiple wheel surface units, and the force on each wheel surface unit can also transfer the load to adjacent wheel surface units to share the local load. The tire has good resetability to adapt to complex terrains and landforms, and can also effectively share local stress impacts to obtain continuous elasticity and buffering. The overall wheel structure has high strength, strong load-bearing capacity and passability. The spring plates on the inner and outer side treads can elastically deform, reducing the requirements for elastic metal and having low usage costs.

[0009] Preferably, connection blocks are arranged on both sides of each of the wheel surface units, and the connection blocks connect two adjacent wheel surface units.

[0010] The resulting technical effects are as follows: Each wheel surface unit is independent, and adjacent wheel surface units are connected by connection blocks, which can effectively disperse stress impacts and obtain continuous elasticity and buffering.

[0011] Preferably, the connection blocks are side-mounted V-shaped plates or side-mounted U-shaped plates, and the open ends of the connection blocks all face the inner side of the tire. Two groups of tread spring plates are respectively fixedly connected to the two outer sides of the connection blocks in a one-to-one correspondence.

[0012] The resulting technical effects are as follows: The connection plates can connect multiple wheel surface units to form a tire. Connecting the tread spring plates to the outer sides of the connection plates can better exert the supporting and connecting functions of the connection plates, improve the roundness of the wheel, and have high passability.

[0013] Preferably, the connection blocks are rigid structural blocks, and hollow sleeves are provided on the inner sides of the connection blocks. Spring rings are connected inside the hollow sleeves, and the spring rings sequentially connect multiple connection blocks on the corresponding side of the tire.

[0014] The resulting technical effects are as follows: The connection blocks are of rigid structures and have sufficient hardness, so that the connection blocks do not deform when the wheel bears a load. The spring rings pass through multiple connection blocks on the same side, and when a local force impact occurs, the deformation can be transmitted to multiple adjacent treads for common deformation.

[0015] Preferably, the outer side surface of the mounting position ring plate has the radian for mounting the tread spring plate, and the mounting position ring plate is bolted or riveted to the inner tread spring plate.

[0016] The resulting technical effects are as follows: The mounting position ring plate is fixedly connected to the inner tread spring plate, ensuring that the inner tread spring plate has sufficient elastic deformation ability.

[0017] Preferably, the inner and outer tread spring plates and the spring rings simultaneously provide elastic support and form an inner and outer tread coupled elastic deformation structure, reducing stress concentration on both sides of the vehicle tire tread.

[0018] The resulting technical effect is that the wheel provides an inner and outer tread coupled elastic deformation structure for the stress concentration phenomenon on both sides of the leaf spring tread. By simultaneously providing elastic support through the inner and outer treads and the spring rings, the radial deformation ability of the wheel is effectively improved, and the driving smoothness is enhanced. Description of the Drawings

[0019] Figure 1 It is the overall structure diagram of a leaf spring tread metal elastic planetary wheel of the present invention;

[0020] Figure 2 It is the cross-sectional schematic diagram of a leaf spring tread metal elastic planetary wheel of the present invention.

[0021] 1 Wheel hub, 11 Mounting position ring plate, 2 Vehicle tire, 21 Tread spring plate, 22 Connecting block, 23 Hollow sleeve, 24 Spring ring, 25 Rivet. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Refer to the attached drawings of the present invention Figures 1 to 2 , according to an embodiment of the present invention, a leaf spring tread metal elastic planetary wheel includes:

[0024] A wheel hub 1, with a mounting position ring plate 11 provided on the outer peripheral side of the wheel hub 1, and the wheel hub is a spoke-type wheel hub;

[0025] Tread spring plates 21, the tread spring plates 21 are all arc-shaped plates and are arranged in pairs and oppositely to form a shuttle-shaped wheel surface unit 26. A plurality of wheel surface units 26 are circumferentially arranged and connected to form a vehicle tire 2. The outer tread of the vehicle tire is an outward convex arch, and the inner tread is an inward convex arch. The inner tread spring plate of the wheel surface unit 26 corresponding to the vehicle tire is fixedly connected to the mounting position ring plate 11, and the outer tread spring plate of the wheel surface unit 26 corresponding to the vehicle tire contacts the lunar soil. The paired tread spring plates 21 elastically deform relatively to adapt to the complex lunar soil terrain.

[0026] In some other embodiments, connection blocks 22 are arranged on both sides of each tread surface unit 26. The connection blocks 22 connect two adjacent tread surface units 26. That is to say, four connection blocks 22 are correspondingly arranged on both sides of each tread surface unit, with two on one side. The two ends of the two connection blocks 22 extend out of the corresponding tread surface unit and are connected to the adjacent tread surface unit 26 on its corresponding side.

[0027] Each connection block 22 connects two adjacent sets of treads at the same time. Each inner and outer tread is fixed to four connection blocks. Both sides of each inner and outer tread are fixedly connected by the connection blocks; the tread surface serves as the working surface to contact the lunar soil, and the outer tread and the inner tread jointly elastically deform inward to adapt to the lunar soil terrain.

[0028] In some other specific embodiments, the connection block 22 is a laterally arranged V-shaped plate or a laterally arranged U-shaped plate. The open ends of the connection blocks 22 all face the inner side of the tire 2, that is, the open ends of the connection blocks on both sides of the tire are arranged oppositely. The two sets of tread spring plates 21 are respectively fixedly connected to the two outer sides of the connection block 22 one by one, making the outer tread of the overall tire more rounded.

[0029] In some other embodiments, the connection block 22 is a rigid structural plate or block with a certain thickness. A hollow sleeve 23 is provided inside the connection block 22, and a spring coil 24 is connected inside the hollow sleeve 23. The spring coil 24 sequentially passes through a plurality of connection blocks 22 on the corresponding side of the tire. The spring coil 24 is slidable with the hollow sleeve 23. The spring coil 24 and the connection block 22 transmit the force on the tread surface unit at the soil contact point to the adjacent tread surface unit, enabling the wheel to achieve continuous and stable elastic deformation.

[0030] The connection block 22 is a rigid structure with sufficient hardness so that the connection block 22 does not deform when the wheel is loaded. The spring coil 24 limits the tread deformation and plays a supporting role, which can improve the rigidity of the wheel.

[0031] In some other specific embodiments, the outer side surface of the mounting position ring plate 11 has the radian for mounting the tread spring plate. The mounting position ring plate 11 is bolted or riveted to the inner tread spring plate 21 using a rivet 25.

[0032] The connection block 22 and the tread spring plate 21 are riveted or bolted.

[0033] The wheel of the present invention provides a coupled elastic deformation structure for the inner and outer treads in view of the stress concentration phenomenon on both sides of the tread of the leaf spring tread metal vehicle tire. By simultaneously providing elastic support by the inner and outer treads and the spring coil, the radial deformation ability of the wheel is effectively improved, and the driving smoothness is improved.

[0034] The tread surface of the wheel of the present invention is a metal tread surface, which has high wear resistance and can avoid the damage and wear of the wheel caused by rigid impact.

[0035] The inner and outer treads of the wheel surface unit of the present invention are discrete units and are successively connected by connecting blocks and spring rings. The independent units can be locally deformed to adapt to the terrain, so as to obtain continuous elasticity and buffering.

[0036] The present invention obtains elasticity by using a large number of structures and multi-unit coupling, avoiding the stress concentration phenomenon at local positions of the wheel and the plastic deformation failure caused by large deformation of elastic elements; at the same time, multi-structure and multi-unit coupling bear pressure and support, with high strength and high load-bearing capacity.

[0037] The present invention changes the force mode of the wheel, and obtains twice the elastic force through the simultaneous deformation of the inner and outer treads, reducing the elastic requirement for the tread spring plate, thereby reducing the material cost.

[0038] The present invention can effectively improve the driving smoothness of the lunar rover and the reliability of the wheel when the road surface is unevenly loaded. When unevenly loaded, one side of the inner tread will be compressed until it is gradually parallel to the ground, and the other side of the inner tread will be lifted; the outer tread follows the inner tread and undergoes elastic deformation; the wheel surface unit will present a "see-saw" form, compressing inward at the force-bearing place and lifting on the other side.

[0039] The present invention will not generate the risk of plastic deformation at the local connection of the tire surface unit of the existing leaf spring vehicle to the wheel hub, and at the same time, it also avoids the risk of plastic deformation caused by large local deformation of the tire surface. The maximum deformation limit position of this wheel is when the inner and outer treads are in contact.

[0040] Due to the limitations of the tire wall thickness and quality control requirements of the elastic tire, it is difficult to provide enough elastic deformation space, and it is difficult to avoid the yield limit problem caused by large deformation of elastic elements. The present invention changes the fixed connection mode between the existing wheel and the wheel hub. The tread can expand axially, obtaining a radial compression amount while avoiding plastic deformation. At the same time, the structure of the inner and outer tires makes the maximum deformation limit of the wheel the contact of the inner and outer tires, so there will be no local large deformation of a single tire surface unit. The simultaneous deformation structure of the inner and outer tires of the present invention has a greater deformation ability than the deformation structure of a single-tire surface wheel and also has a higher load-bearing capacity.

[0041] The present invention can be applied to manned lunar rovers, Mars rovers and various asteroids. It is connected to the vehicle body of the lunar rover through the wheel hub, and the wheel can also be improved according to different usage scenarios on different planets. In the usage scenario of soft terrain, wheel spikes can be manufactured on the surface of the metal outer tread of the present invention to increase the ground gripping force and prevent getting stuck in the sand or slipping.

[0042] For the devices and usage methods disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, refer to the description in the method section.

[0043] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily 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 invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leaf spring tread metal elastic planet wheel, characterized in that, Comprising: A wheel hub (1), on the outer peripheral side of which there is an installation position ring plate (11); Tread spring plates (21), the tread spring plates (21) are all arc-shaped plates and are arranged in pairs opposite to each other to form a shuttle-shaped wheel surface unit (26). A plurality of the wheel surface units (26) are circumferentially arranged and connected to form a tire (2). The inner tread spring plate of the wheel surface unit (26) corresponding to the tire is fixedly connected to the installation position ring plate (11), and the outer tread spring plate of the wheel surface unit (26) corresponding to the tire is in contact with the stardust. The paired tread spring plates (21) are elastically deformed relative to each other to adapt to the complex stardust terrain; on both sides of each wheel surface unit (26), there are connecting blocks (22) arranged, and the connecting blocks (22) connect two adjacent wheel surface units (26); inside the connecting block (22), there is a hollow sleeve (23), and a spring ring (24) is slidably connected inside the hollow sleeve (23), and the spring ring (24) sequentially passes through a plurality of connecting blocks (22) on the corresponding side of the tire.

2. The leaf spring tread metal elastic planetary wheel according to claim 1, characterized in that, The connecting block (22) is a side-mounted V-shaped plate or a side-mounted U-shaped plate, and the open ends of the connecting block (22) all face the inside of the tire (2), and the paired two tread spring plates (21) are respectively fixedly connected to the two outer sides of the connecting block (22).

3. A leaf spring tread metal elastic planet wheel according to claim 2, characterized in that, The connecting block (22) is a rigid structural block.

4. A leaf spring tread metal elastic planetary wheel according to claim 1, characterized in that, The outer side surface of the installation position ring plate (11) has the radian for installing the tread spring plate, and the installation position ring plate (11) is bolted or riveted to the inner tread spring plate (21).

5. A leaf spring tread metal elastic planet wheel according to claim 1, characterized in that, The inner and outer tread spring plates (21) and the spring ring (24) simultaneously provide elastic support and form an inner and outer tire surface coupled elastic deformation structure, reducing the stress concentration on both sides of the tire tread.

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