Light high-impact-resistance tire assembly for microminiature unmanned platform

Abstract

The utility model discloses a light high-impact-resistance tire assembly for a microminiature unmanned platform, which belongs to the field of microminiature unmanned vehicles and comprises a tire core, a tire shell, a hub, a hub side end cover and a side protection device, and the tire shell comprises a tire base and patterns. The foam tire core is designed to be of an integrated structure or a split structure based on the width of the limiting plates on the two sides of the tire base, so that the tire core and the tire shell can be assembled on the premise that the tire shell is not damaged, the machining cost can be reduced, and the appearance integrity of the tire assembly is guaranteed. The patterns of the tire shell are designed into an arc-shaped gradually-changing structure with a thick middle part and two thin ends, so that the steering of the tire is greatly facilitated. A hub side face end cover and a side face protection device are arranged on the end face of the hub, a bearing in the hub can be protected, and energy generated when the miniature unmanned vehicle is subjected to side face impact is absorbed. In addition, the utility model has the advantages of light weight, shock absorption, high buffer performance, convenience in production and processing, simplicity in assembly and the like.

Description

Technical Field

[0001] The utility model belongs to the field of micro-sized unmanned vehicles, in particular to a tire assembly for a lightweight and highly impact-resistant micro-sized unmanned platform. Background Art

[0002] The micro-unmanned vehicle is light in weight, easy to carry, and has good anti-vibration, anti-fall and impact resistance. It can complete reconnaissance, patrol, and alert tasks in multiple working conditions, and is widely used in military, police, and civilian fields. The traditional micro-unmanned vehicle tire is mainly composed of a foam tire core, a tire shell, a wheel hub, and a side protection device. It has the following disadvantages: 1. The foam tire core is wrapped with a tire shell, which increases the quality of the micro-unmanned vehicle tire assembly. At the same time, the mold needs to be opened when processing the tire shell, which is difficult and costly to process; 2. During the assembly process, when the overall size of the tire is relatively small, the internal tire core can be directly inserted into the hollow part of the rubber outer skin. When the overall size of the tire is relatively large, due to the size limitation of the middle wheel hub, it is difficult to directly insert the foam core into the tire shell. The rubber outer skin needs to be cut during processing, and after the foam core is installed, the rubber outer skin is bonded with an adhesive, which will further increase the processing cost, and there are very obvious traces at the bonding point, which affects the appearance of the tire assembly. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: the limiting plates on both sides of the tire base are designed to match the tire core structure made of foam material. When the width of the limiting plates is small, the tire core is designed as an integrated structure, so that the assembly of the tire core and the tire shell can be completed at one time, thereby improving the assembly efficiency; when the width of the limiting plates is large, the tire core is designed as a split structure, which has large deformation under force. The tire core and the tire shell can be assembled without damaging the tire shell. While reducing the processing cost, the appearance of the tire assembly is guaranteed, thereby achieving the purpose of the utility model.

[0005] The utility model relates to a lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform, comprising a tire core, a tire shell and a wheel hub, wherein the tire core is made of a foam material and is located inside the tire shell, and the wheel hub is located in a middle cavity of the tire core, and the tire core comprises an outer straight section and an inner retracted section; the tire shell is made of a lightweight, wear-resistant and elastic material, and comprises a tire base and a pattern, the tire base comprises a middle circular ring structure and limiting plates on both sides, and the pattern is located on the outer surface of the circular ring structure of the tire base; when the width of the limiting plate of the tire base is not greater than the width of the straight section of the tire core, the tire core is an integrated structure; when the width of the limiting plate of the tire base is greater than the width of the straight section of the tire core, the tire core is a split structure.

[0006] Preferably, when the tire core is a split structure, it is composed of an inner tire core and an outer tire core; the inner tire core includes an inward section, and a protrusion is arranged on the outer surface; the outer tire core includes a straight section, and a groove is arranged on the inner surface to match the protrusion structure of the inner tire core; the inner tire core is located inside the outer tire core, and the protrusions and grooves of the two are placed in a matching manner.

[0007] Further preferably, the limiting plates on both sides of the tire base include a straight section and an inward-retracted section, and a limiting structure is provided on the inner surface of the inward-retracted section.

[0008] Further preferably, the inner tire core further includes a straight section, or the outer tire core further includes an inwardly retracted section.

[0009] More preferably, the width of the straight section accounts for 2 / 9 to 1 of the width of the retracted section.

[0010] Preferably, the retraction angle of the retraction section is 3° to 8°.

[0011] Preferably, the pattern is in a "V"-shaped structure, and the inner angle of the bottom is 70° to 85°.

[0012] Further preferably, the pattern as a whole is an arc-shaped gradient structure that is thick in the middle and thin at both ends, and is provided with a through groove.

[0013] Preferably, the limiting plate is a structure with a gradual thickness change, and the thickness gradually becomes thinner from the outside to the inside.

[0014] Preferably, it also includes a hub side end cover and a side protection device, which are arranged on the end surface of the hub.

[0015] The utility model relates to a lightweight, highly impact-resistant tire assembly for a micro-sized unmanned platform, wherein the foam tire core can be designed as an integrated structure or a split structure based on the width of the limiting plates on both sides of the tire base, so that the tire core and the tire shell can be assembled without damaging the tire shell, which can reduce the processing cost and ensure the appearance of the tire assembly. When the tire core is designed as a split structure of an inner tire core and an outer tire core, matching protrusions and groove structures are respectively designed at the connection interface between the two, so that the circumferential relative movement between the two can be avoided; a limiting structure is provided on the inner surface of the limiting plate of the tire shell, which can protect the inner surface edge of the inner tire core, avoid wear on it by the wheel hub, and increase its service life. The pattern of the tire shell is designed as an arc-shaped gradient structure with a thick middle and thin ends, which greatly facilitates the steering of the tire; the pattern is grooved, which can reduce the weight of the tire, increase the friction between the tire and the road, improve the handling performance of the unmanned vehicle, and enhance the overall visual effect of the tire. The wheel hub end surface is provided with a wheel hub side end cover and a side protection device, which can protect the internal bearing of the wheel hub and absorb the energy when the micro unmanned vehicle is hit from the side. In addition, the utility model also has the advantages of light weight, shock absorption, high buffering performance, convenient production and processing, and simple assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It shows the schematic diagram of the first structure of the one-piece foam tire;

[0017] Figure 2 It shows the schematic diagram of the foam tire core structure;

[0018] Figure 3 It shows a schematic diagram of the tire casing structure of Example 1;

[0019] Figure 4 It shows the schematic diagram of the plastic wheel hub structure;

[0020] Figure 5 It shows the schematic diagram of the wheel hub side end cover structure;

[0021] Figure 6 It shows the schematic diagram of the structure of the side protection device;

[0022] Figure 7 It shows a schematic diagram of the tire casing structure of Example 2;

[0023] Figure 8 It shows the schematic diagram of the inner tire core structure;

[0024] Fig. 9 It shows the schematic diagram of the tire core structure;

[0025] Fig.10 It shows a schematic diagram of the tire casing structure of Example 3;

[0026] Fig.11 It shows a schematic diagram of a single pattern structure of Example 1.

[0027] Among them, 1-tire core, 2-tire shell, 3-wheel hub, 4-wheel hub side end cover, 5-side protection device, 10-inner tire core, 11-outer tire core, 21-tire base, 22-pattern, 23-limiting structure, 31-limiting ring, 32-U-shaped wheel hub groove, 33-threaded hole, 51-ring, 52-circular plate, 53-equal wall thickness arc plate. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below through specific implementation methods, but this should not be construed as limiting the scope of the present invention to the following examples. Without departing from the above method concept of the present invention, various substitutions or changes made according to common technical knowledge and conventional means in the field should be included in the scope of the present invention.

[0029] Example 1

[0030] like Figure 1 As shown, the integrated foam tire for a micro-sized unmanned vehicle of this embodiment includes a tire core 1 and a tire pattern 2.

[0031] like Figure 2 As shown, the tire core 1 is made of EVA foam material and is a hollow rotating body structure, including an outer straight section and an inner retracted section. The retracted angle of the retracted section is 8°, and the outer edge of the straight section has a rounded corner with a radius of 2mm; the inner edge of the retracted section has a rounded corner with a radius of 2mm. The tire core 1 has an inner diameter of 56 mm, an outer diameter of 144 mm, and an inner diameter of 100 mm for the straight section.

[0032] Tire casing 2, such as Figure 3 As shown, it is made of natural rubber material and includes a tire base 21 and a pattern 22. The tire base 21 is composed of a circular ring structure of equal thickness in the middle and a stop plate of gradient thickness on both sides. The connection between the circular ring structure and the stop plate has a fillet with a radius of 2mm; the circular ring structure is 2mm thick and has an inner diameter of 144mm; the stop plate is 10mm wide and smoothly transitions from 2mm thick at the connection with the circular ring structure to 0.5mm thick at the end. Fig.11As shown, a single pattern 22 is in a "V" shape, which is an arc-shaped gradual structure with a thick middle and thin ends to facilitate tire steering. Its bottom inner angle is 85°, the side width is 8mm, the middle thickness is 3mm, the radius of the gradual arc is 105mm, and the center of the circle is located at the symmetry plane of the "V"-shaped pattern 22, 105mm away from the vertex of the upper surface of the bottom of the "V"-shaped pattern 22; in order to reduce the weight of the tire, increase the friction between the tire and the road, improve the control performance of the unmanned vehicle, and enhance the overall visual effect of the tire, the "V"-shaped pattern 22 is grooved, specifically: a 4mm wide through groove is opened along the symmetry plane of the "V"-shaped pattern 22 and it is disconnected; three 2mm wide through grooves are opened on the left and right sides, and the through groove spacing is 6mm. There are twenty patterns 22, which are evenly distributed on the outer surface of the tire base ring structure in the circumferential direction.

[0033] Hub 3, such as Figure 4 As shown, it is integrally formed of ABS material and has a hollow stepped rotating body structure. The middle cylindrical cavity of the wheel hub 3 is used to install the wheel bearing. A limiting ring 31 is arranged on the outer circumference to limit the axial movement of the foam tire core 1. Three axial U-shaped wheel hub grooves 32 are evenly distributed in the circumferential direction of the inner wall, and three threaded holes 33 are evenly distributed in the axial direction on the right end face. The minimum inner diameter of the wheel hub 3 is 36 mm, the outer diameter is 55 mm, and the height of the limiting ring 31 is 1.5 mm.

[0034] Hub side end cover 4, such as Figure 5 As shown, the wheel hub side end cover 4 is formed of ABS material as a whole, and is composed of a coaxially arranged circular plate and a circular ring, with an outer diameter of 54mm and a thickness of 3mm for the circular plate, an outer diameter of 50mm, an inner diameter of 40mm and a thickness of 4mm for the circular ring. Three evenly distributed U-shaped end cover through grooves 41 are arranged on the inner wall of the circular ring, and the positions correspond to the wheel hub through grooves 32; three through holes penetrating the circular ring and the circular plate are arranged along the outer wall of the circular ring, and the positions correspond to the threaded holes 33.

[0035] Side protection device 5, such as Figure 6 As shown, it is made of EVA foam material and consists of a ring 51, a circular plate 52 and an arc plate 53 of equal wall thickness. The inner diameter of the ring is 54 mm, the outer diameter is 62 mm, and the thickness is 3 mm; the outer diameter of the circular plate is 90 mm, and the thickness is 5 mm; the sphere radius of the arc plate is 51 mm, and the height is 22 mm. The side protection device 5 has three through holes that penetrate the circular plate and the arc plate, and the positions correspond to the through holes of the side end cover 4 of the wheel hub.

[0036] When assembling the lightweight and high-buffering micro-unmanned vehicle tire assembly of the utility model, first assemble the integrated foam tire: bond the tire shell 2 to the upper surface of the tire core 1; then embed the wheel hub 3 into the middle cavity of the tire core 1; bond the wheel hub side end cover 4 to the side protection device 5 through an elastic adhesive, and pay attention to aligning the three axially evenly distributed through holes of the two during bonding, and finally align the circumferentially evenly distributed through holes of the wheel hub 3 with the circumferentially evenly distributed through holes of the wheel hub side end cover 4, and use threads to fix the two together, with the side protection device 5 facing outward in a hemispherical shape.

[0037] Example 2

[0038] The difference from Example 1 is that:

[0039] The inward angle of the inward section of the tire core 1 is 4°, the inner diameter of the tire core 1 is 56 mm, the outer diameter is 144 mm, and the inner diameter of the straight section is 128 mm.

[0040] like Figure 7 As shown, the width of the limit plate is 17 mm, and a single pattern 22 of the tire shell 2 is a rectangular parallelepiped structure of 20 mm×6 mm×3 mm. The patterns 22 are evenly distributed on the outer surface of the tire base ring structure, of which 3 are distributed axially, and the interval between adjacent patterns 22 is 8 mm; and 18 are distributed circumferentially.

[0041] Example 3

[0042] The difference from Example 1 is that:

[0043] The tire core 1 is composed of an inner tire core 10 and an outer tire core 11. Figure 8 As shown, the inner surface diameter of the inner tire core 10 is 56mm, the outer surface diameter is 110mm, both sides are inward-retracted structures, the inward-retracted angle is 3°, and the inverted radius of the inward-retracted section connected to the inner surface is 1.5mm rounded; two rectangular protrusions are symmetrically arranged on the outer surface, the width of the protrusions is 7mm, the height is 8mm, and the length is consistent with the thickness of the straight section. Fig. 9 As shown, the inner surface diameter of the tire core 11 is 110 mm, the outer surface diameter is 144 mm, both sides are straight sections, and the connection with the outer surface has a rounded corner with a radius of 1.5 mm; two grooves are symmetrically arranged on the inner surface, and the structure matches the rectangular protrusion of the inner tire core 10. The inner tire core 10 is located inside the outer tire core 11, and the rectangular protrusions are matched and connected with the grooves to prevent the inner tire core 10 and the outer tire core 11 from having circumferential relative movement.

[0044] Tire casing 2, such as Fig.10As shown, it is made of butadiene rubber with a hardness of 50° (Shore A), including a tire base 21, a pattern 22 and a limiting structure 23. The limiting plates on both sides of the tire base 21 are symmetrical equal thickness structures with a thickness of 2mm, consisting of a straight section and an inward section; the inner diameter of the straight section is 114mm; the inward angle of the two inward sections is 3°, and the inner diameter of the inward section is 62mm. The inner angle at the bottom of the pattern 22 is 70°, the thickness in the middle is 5mm, the radius of the gradual arc is 95mm, and the center of the circle is located at the symmetry plane of the "V"-shaped pattern 22 and 95mm away from the vertex of the upper surface of the bottom of the "V"-shaped pattern 22. The limiting structure 23 has an inner diameter of 56mm, an outer diameter of 62mm, and a thickness of 2mm. There are two limiting structures 23, which are respectively located on the inner surfaces of the inward sections on both sides; the limiting structure 23 and the inward section are axially offset by 0.8mm, so that the inner side surface of the limiting structure 23 is 0.8mm higher than the inner side surface of the inward section.

[0045] When assembling the lightweight and high-buffering micro-unmanned vehicle tire assembly of the utility model, the integrated foam tire is assembled first: first, the outer tire core 11 is elastically deformed by applying external force, so that it can be conveniently placed in the tire shell 2; then, the inner tire core 10 is placed in the tire shell 2 while being elastically deformed, and its rectangular protrusion is matched and connected with the groove of the outer tire core 11; the limiting structure 23 is coated on the outer side of the inner surface edge of the inner tire core 10 to prevent the wheel hub 3 from wearing it and prolonging its service life.

[0046] Example 4

[0047] The difference from Example 3 is that:

[0048] The inner diameter of the tire core 10 is 56 mm, the outer diameter is 100 mm, and the inner angle of the inner section is 5°. The inner diameter of the tire core 11 is 100 mm, the outer diameter is 144 mm, and it is composed of a straight section and an inner section. The inner diameter of the straight section is 110 mm, and the radius of the connection with the outer surface is 2 mm. The inner angle of the inner section is 5°.

[0049] Embodiment 4 makes it easier to complete the assembly of the tire core 1 and the tire shell 2.

Claims

1. A lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform, comprising a tire core, a tire shell and a wheel hub, wherein the tire core is made of a foam material and is located inside the tire shell, and the wheel hub is located in the middle cavity of the tire core, and is characterized in that: The tire core (1) comprises an outer straight section and an inner retracted section; the tire shell (2) is made of a lightweight, wear-resistant and elastic material, and comprises a tire base (21) and a pattern (22); the tire base (21) comprises a central annular structure and limiting plates on both sides; the pattern (22) is located on the outer surface of the annular structure of the tire base (21); when the width of the limiting plates of the tire base (21) is not greater than the width of the straight section of the tire core (1), the tire core is an integrated structure; when the width of the limiting plates of the tire base (21) is greater than the width of the straight section of the tire core (1), the tire core is a split structure.

2. According to claim 1, a lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform, characterized in that: When the tire core (1) is a split structure, it is composed of an inner tire core (10) and an outer tire core (11); the inner tire core (10) comprises an inwardly contracted section, and a protrusion is arranged on the outer surface; the outer tire core (11) comprises a straight section, and a groove is arranged on the inner surface to match the protrusion structure of the inner tire core (10); the inner tire core (10) is located inside the outer tire core (11), and the protrusions and grooves of the two are placed in a matching manner.

3. According to claim 2, a lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform, characterized in that: The limiting plates on both sides of the tire base (21) include a straight section and an inward-retracted section, and the inner surface of the inward-retracted section is provided with a limiting structure (23).

4. The lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to claim 2, characterized in that: The inner tire core (10) further comprises a straight section, or the outer tire core (11) further comprises an inwardly contracted section.

5. A lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to any one of claims 1 to 4, characterized in that: The width of the straight section accounts for 2 / 9 to 1 of the width of the retracted section.

6. The lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to claim 1, characterized in that: The inward angle of the inward section is 3° to 8°.

7. The lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to claim 1, characterized in that: The pattern (22) is in a "V"-shaped structure, and the inner angle of the bottom is 70° to 85°.

8. The lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to claim 6, characterized in that: The pattern (22) is an overall arc-shaped gradient structure that is thick in the middle and thin at both ends, and is provided with a through groove.

9. The lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to claim 1, characterized in that: The limiting plate has a thickness gradient structure, and the thickness gradually becomes thinner from the outside to the inside.

10. The lightweight and highly impact-resistant tire assembly for a micro-sized unmanned platform according to claim 1, characterized in that: It also includes a wheel hub side end cover (4) and a side protection device (5), which are arranged on the end surface of the wheel hub (3).

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