Tractor spiral tire

Abstract

The utility model relates to a tractor spiral tire which comprises a hollow roller, spiral protrusions are arranged on the outer circumferential face of the roller, the section of each spiral protrusion is semicircular, circular truncated cones are arranged at the two ends of the roller, and a plurality of groove-shaped tread patterns are arranged on the spiral protrusions at equal intervals in the length direction. Compared with an existing knife-shaped spiral tire, the spiral tire has the advantages that the section of the spiral tire along the spiral line is semicircular, so that the spiral tire is not easy to sink like the knife-shaped section, and the contact pressure between the cylindrical surface of the roller outside the spiral area and the ground is reduced; compared with a wheel type tractor tire and a crawler type tractor tire, the wheel type tractor tire has the advantages that the environment adaptability is wider, and the friction resistance and the energy loss in the running process are reduced except for farmland, paddy field, marshland and desert; and the hollow structure even allows the vehicle to run on the water surface.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to the field of tractor tires, and specifically refers to a tractor spiral tire. Background Art

[0002] At present, there are two main types of tractor tires: wheeled and crawler. The former is mainly used on relatively flat ground, while the latter can work on complex ground such as mud, mountains and hills, but it is still difficult to use in extremely harsh conditions such as paddy fields, swamps, deserts, etc. In order to expand the range of vehicles, the tires of the vehicles are required to have a wider range of road adaptability.

[0003] The utility model patent with publication number CN108248718A discloses an omnidirectional mobile working platform, which is driven by knife-shaped spiral tires. The friction resistance and energy loss during driving are large, and the platform is highly destructive to paved roads. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a tractor spiral tire, so that the tractor has the ability of amphibious and all-terrain farmland operation.

[0005] The utility model is realized through the following technical scheme, which provides a tractor spiral tire, comprising a hollow drum, wherein the outer circumferential surface of the drum is provided with a spiral protrusion, and the cross section of the spiral protrusion is semicircular.

[0006] The tires in this scheme are used in pairs. Through the rotation of the drum and the matching spiral protrusions, the tractor can be moved forward and backward, left and right, and turned. The spiral protrusions improve the grip on the ground. The hollow structure of the drum allows it to travel on the water to a certain extent.

[0007] As an optimization, round platforms are provided at both ends of the drum, so as to reduce the resistance with the ground when moving forward and backward.

[0008] As an optimization, the end of the spiral protrusion fits with the conical surface extending from the truncated cone, so as to facilitate the contact between the spiral protrusion and the ground when the tire moves forward and backward.

[0009] As an optimization, a plurality of groove-shaped tread patterns are arranged at equal intervals along the length direction on the spiral protrusion. The groove-shaped tread patterns are provided to improve the grip on the ground.

[0010] As an optimization, the groove-shaped tread pattern extends along the circumference of the spiral raised section, thereby improving the grip and facilitating the drainage of water flow.

[0011] As an optimization, the length of the roller is greater than the outer diameter of the roller, thereby increasing the length of the spiral protrusion and the contact area with the ground.

[0012] The beneficial effects of the utility model are:

[0013] 1. Compared with wheeled and crawler tractor tires, the spiral tire of the utility model has a wider range of environmental adaptability. In addition to farmland, paddy fields, swamps, and deserts, its hollow structure even allows it to travel on the water.

[0014] 2. Compared with the existing knife-shaped spiral tire, the cross-section of the spiral tire along the spiral line of the utility model is semicircular, so that it is not as easy to sink as the knife-shaped cross-section, thereby reducing the contact pressure between the cylindrical surface of the drum outside the spiral area and the ground, thereby reducing the friction resistance and energy loss during driving.

[0015] 3. Compared with the existing knife-shaped spiral tires, the semicircular cross-section spiral of the spiral tire of the utility model does not have a sharp edge like the knife-shaped spiral, and is less destructive to the paved road surface during driving and is not easy to cut the road surface.

[0016] 4. Compared with the existing knife-shaped spiral tire, the spiral tire of the utility model has a groove-tooth tread pattern distributed on the spiral, which enhances its grip on the ground and helps to reduce slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a diagram of the use state of the utility model;

[0019] As shown in the figure:

[0020] 1. Cone, 2. Spiral protrusion, 3. Roller, 4. Spiral section, 5. Grooved tread pattern, 6. Conical surface, 7. Tractor frame, 8. Frame plate, 9. Front connector, 10. Spiral tire, 11. Rear connector, 12. Output shaft of transmission box, 13. Transmission box, 14. Input shaft of transmission box, 15. Power connector, 16. Output shaft of power machine, 17. Power machine. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0022] like Figure 1~2As shown, a tractor spiral tire of the utility model comprises a hollow drum 3, the middle of the drum 3 is cylindrical, and both ends of the drum 3 are provided with a truncated cone 1. The large bottom surface and the cylindrical end surface of the truncated cone 1 have the same diameter and are welded together, and the entire cylindrical area and the truncated cone 1 area form a hollow structure. The length of the drum 3 is greater than the outer diameter of the drum 3.

[0023] The outer circumferential surface of the drum 3 is provided with a spiral protrusion 2, and the spiral protrusion 2 is fixedly connected to the cylindrical area with equal pitch.

[0024] The cross-section of the spiral protrusion 2 is semicircular, so that it is not as easy to sink as a knife-shaped cross-section, thereby reducing the contact pressure between the cylindrical surface of the drum and the ground outside the spiral area, thereby reducing the friction resistance and energy loss during driving. It is less destructive to the flat road surface during driving and is not easy to cut the road surface.

[0025] The end of the spiral protrusion 2 is in contact with the conical surface 6 extending from the truncated cone 1. The spiral protrusions 2 are all located inside the conical surface 6 extending from the truncated cone 1. Specifically, the side surface of the truncated cone 1 forms a virtual conical surface 6 after extension, and the semicircular cross-section spiral 2 located outside the conical surface 6 is cut off.

[0026] The spiral protrusion 2 is provided with a plurality of groove-shaped tread patterns 5 at equal intervals along the length direction, which enhances its ability to grip the ground and helps to reduce slippage. In this embodiment, the groove-shaped tread pattern 5 extends along the circumference of the cross section of the spiral protrusion 2 .

[0027] The use of the utility model:

[0028] 1. Installation of spiral tire

[0029] like Figure 2 As shown, the spiral propulsion system of the tractor includes a connecting plate 8, a front connector 9, a spiral tire 10, a rear connector 11, an output shaft 12 of a transmission box, a transmission box 13, an input shaft 14 of the transmission box, a power connector 15, an output shaft 16 of a power machine, and a power machine 17; the power machine 17 can be an electric motor or a tractor engine.

[0030] The tractor has two sets of screw propulsion systems. For any set of screw propulsion systems, the following connection relationship is followed:

[0031] The transmission box 13, the power machine 17 and the connecting plate 8 are all fixed on the tractor frame 7; the input shaft 14 of the transmission box is connected to the output shaft 16 of the power machine through the power connector 15; one end of the spiral tire 10 is connected to the output shaft 12 of the transmission box through the rear connector 11, and the other end is inserted into the hole of the connecting plate 8 through the front connector 9 and rotates therein; the output shaft 12 of the transmission box is coaxial with the hole of the connecting plate 8.

[0032] The spiral protrusions 2 of the two spiral tires on the left and right sides of the tractor have opposite rotation directions; the transmission box 13 is implemented by using relatively mature chain transmission technology or gear transmission technology, which is a mature existing technology and will not be described in detail here.

[0033] 2. Tractor motion control

[0034] like Figure 2 As shown, when the left spiral tire and the right spiral tire have opposite directions and the same rotation speed, the tractor moves longitudinally; when the left spiral tire and the right spiral tire have the same direction and the same rotation speed, the tractor moves laterally; when the left spiral tire and the right spiral tire have different rotation speeds, the tractor turns.

[0035] 3. Specific examples

[0036] for Figure 2 The rotation direction of the semicircular cross-section spiral of the spiral tire shown in FIG. 1 is shown in FIG. 1 . Assuming that the absolute value of the rotation speed of the spiral tires on the left and right sides is N, the motion control method of the tractor is shown in Table 1. The direction of the spiral tire in Table 1 refers to the direction of rotation of the spiral tire when a person stands Figure 2 Results are shown viewed from the rear of the tractor and facing the tractor.

[0037] Table 1 Tractor motion control logic

[0038]

[0039] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A tractor spiral tire, characterized in that: It comprises a hollow roller (3), wherein a spiral protrusion (2) is provided on the outer circumferential surface of the roller (3), and the cross section of the spiral protrusion (2) is semicircular.

2. A tractor spiral tire according to claim 1, characterized in that: Both ends of the drum (3) are provided with round platforms (1).

3. A tractor spiral tire according to claim 2, characterized in that: The end of the spiral protrusion (2) fits into the conical surface (6) extending from the truncated cone (1).

4. A tractor spiral tire according to claim 1, characterized in that: A plurality of groove-shaped tread patterns (5) are arranged at equal intervals on the spiral protrusion (2) along the length direction.

5. A tractor spiral tire according to claim 4, characterized in that: The groove-shaped tread pattern (5) extends along the circumference of the cross section of the spiral protrusion (2).

6. The tractor spiral tire according to claim 1, characterized in that: The length of the roller (3) is greater than the outer diameter of the roller (3).

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