Tire nail embedding method

Abstract

The invention provides a tire nailing method which solves the technical problems that when an existing nailed tire provides good road holding force, a pin falls off and deviates, and the pin seriously abrades the tire and the road surface when the tire runs on the road surface without ice and snow, and can be widely applied to the field of tire nailing. The method specifically comprises the following steps of: dividing a tire tread into left and right sides by taking a center line of a tire crown as a symmetric center, and dividing each side into 11 tracks; wherein the shoulder part is a first track, and the sequence of the shoulder part is sequentially increased towards the center line; the distance among the fourth track, the fifth track and the sixth track is 4.5%-5.25% of the length of the tire grounding edge running surface, and the distance among the other tracks is 4%-4.25% of the length of the tire grounding edge running surface; nail holes are formed in the track, no nail hole is formed within 5%-5.75% of the running length of the ground contact edge of the tire shoulder, pins are inserted into all the nail holes, and the nail-embedded tire is formed.

Description

Technical Field

[0001] The invention belongs to the technical field of tire studding, and in particular relates to a tire studding method. Background Art

[0002] When snow tires are used in extremely cold weather, their adhesion to ice and snow roads decreases rapidly, making it difficult to ensure driving safety. Generally, pins are added to the tires to improve traction and achieve safe driving. However, while traditional studded tires provide good grip, there are problems with pins falling off and deflecting, and pins causing serious wear on tires and roads when driving on non-ice and snow roads. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology and provide a tire studding method.

[0004] To this end, the present invention provides a method for inserting nails into a tire, comprising the following steps:

[0005] Taking the center line of the tire crown as the center of symmetry, the tire tread is divided into left and right sides, and each side is divided into 11 tracks;

[0006] The shoulder is the first track, and the distance increases gradually as it approaches the center line; the distance between the fourth track, the fifth track and the sixth track is 4.5%-5.25% of the length of the tire grounding edge running surface, and the distance between the remaining tracks is 4%-4.25% of the length of the tire grounding edge running surface;

[0007] The nail holes are opened on the track. No nail holes are opened within 5%-5.75% of the running length from the contact edge of the tire shoulder. The nail holes are located in the middle of the track line segment on the tread block through which the track passes, and the number of nail holes on the two symmetrical tracks is equal;

[0008] Insert the pins into all the nail holes to form a studded tire.

[0009] Furthermore, the difference in the number of nail holes among the sixth track, the seventh track and the eighth track does not exceed 5.

[0010] Furthermore, the positions of the nail holes in the cross-sectional direction of the tire are arranged along the pattern pitch, the difference in the number of nail holes in each contact area does not exceed 2, and no pattern grooves or steel sheets are arranged within a radius of 10 mm around each pin position.

[0011] Furthermore, the pin includes a nail seat and a nail rod, the end of the nail rod is provided with a flange with a diameter larger than the diameter of the nail rod, and a nail core is provided at the center of the top of the flange, and the nail core is made of wear-resistant rubber material.

[0012] Furthermore, the nail hole includes an upper edge, an extension portion and a clamping portion, and a circular chamfer transition is used between the upper edge and the extension portion; the shape of the upper edge is adapted to the shape of the flange, the shape of the extension portion is adapted to the shape of the nail rod, and the shape of the clamping portion is adapted to the shape of the nail seat.

[0013] The present invention provides a tire nailing method, which has the following beneficial effects:

[0014] Through the design method of the present invention, the difference range between the maximum and minimum values ​​of the force on the pins in the same ground contact area can be adjusted to within 20%, so that the force on the pins at each position is balanced, so that the studded tire can not only exert excellent traction performance on ice, but also reduce the wear on the road surface and driving noise to an extremely low level during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the pin distribution of the present invention;

[0016] Figure 2 yes Figure 1 A magnified view of the bottom of

[0017] Figure 3 This is the tire stress analysis image before studding;

[0018] Figure 4 This is the stress analysis image of the tire after studding;

[0019] Figure 5 It is a schematic diagram of the position of the tread pitch selected for the tire after studding;

[0020] Figure 6 It is the pressure distribution diagram of the tread pitch selected by the tire after studding;

[0021] Figure 7 It is the structural diagram of the pin;

[0022] Figure 8 It is a cross-sectional view of the nail hole;

[0023] Fig. 9 It is the assembly drawing of the pin and the pin hole;

[0024] Markings in the figure: 1, pin; 2, nail seat; 3, nail rod; 4, flange; 5, upper edge; 6, extension part; 7, clamping part; 8, crown grounding edge area; 9, nail core. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercial products unless otherwise specified.

[0026] The nail holes should cover the entire crown contact area of ​​the tire, which can maximize the grip and traction of the studded tire. The crown contact edge area 8 is within 5%-5.75% of the running surface length (TAW) of the two shoulder contact edges of the tire, and nail holes should not be arranged.

[0027] like Figure 1 , as shown in 2, the center line of the tire crown is used as the symmetry center, and the tire tread is divided into left and right sides, and each side is further divided into 11 tracks;

[0028] The shoulder is the first track, and the distance increases gradually as it approaches the center line; the distance between the fourth track, the fifth track and the sixth track is 4.5%-5.25% of the length of the tire grounding edge running surface, and the distance between the remaining tracks is 4%-4.25% of the length of the tire grounding edge running surface;

[0029] The nail holes are distributed in the middle of the track line segment on the pattern block where the track passes, and are arranged according to the principle that the total number of nail holes on each track is equal. If the track pattern block cannot meet the nail hole size, no nail hole is required. The difference in the number of nail holes between the sixth track, the seventh track and the eighth track shall not exceed 5.

[0030] The positions of the nail holes in the tire cross section are arranged along the pattern pitch, and the difference in the number of nail holes in each contact area does not exceed 2, so the number of nail holes in the tire cross section is consistent. If the number of pins 1 on both sides of the center line is cross-distributed, such as 2 nail holes on the left side of the center line and 1 nail hole on the right side, then the next group of cross sections will have 1 nail hole on the left side and 2 nail holes on the right side.

[0031] In order to ensure the rigidity of the tire at the nail hole position and prevent the pin 1 from causing damage to the tire, no tread grooves or steel sheets are provided within a radius of 10 mm around each pin 1 position, but a lighter pattern decoration may be added in the area. Fig. 9 As shown, the nail hole and the pin 1 adopt an interference fit, such as Figure 7 As shown, the pin 1 includes a pin seat 2 and a pin rod 3. The end of the pin rod 3 is provided with a flange 4 having a diameter larger than that of the pin rod 3. The top center of the flange 4 is provided with a pin core 9, which is made of wear-resistant rubber material. Figure 8As shown, the nail hole includes an upper edge 5, an extension 6 and a clamping portion 7. A circular chamfer is used between the upper edge 5 and the extension 6 to prevent the pin 1 from tearing and damaging the edge of the tire nail hole when the ground is stressed. The shape of the upper edge 5 is adapted to the shape of the flange 4, the shape of the extension 6 is adapted to the shape of the nail rod 3, and the shape of the clamping portion 7 is adapted to the shape of the nail seat 2. The upper half of the nail hole is a columnar style, which can firmly fix the pin 1; the lower half of the nail hole adopts a tightening transition structure, which tightly covers the pin 1, not only plays a role in fixing the pin 1, but also can reduce the noise generated by the force between the pin 1 and the road surface; the bottom of the nail hole adopts an arc design to fix the flange 4 of the pin 1, which can prevent the flange 4 from damaging the tire. The pin 1 is assembled with the nail hole to ensure the stability of the pin 1 and have the maximum anti-skid efficiency, so that the pin 1 is not easy to fall off and deflect during the use of the nailed tire, and can ensure the grip of the pin 1 on the ice and snow road surface.

[0032] Taking the 205 / 55R16 tire with 200 nail holes as an example, 11 tracks are designed on both sides of the center line of the tire crown. On the eleventh track, there are 0 nail holes due to the size of the tread blocks, and 10 nail holes are arranged on the remaining tracks respectively. The tire has a total of 70 tread blocks, of which 10 blocks have 2 nail holes, and the rest have 3 nail holes, and the blocks with 2 nail holes are evenly interspersed.

[0033] like Figure 3 , 4, the tire ground contact force analysis before and after studding is performed, as shown in 5, 6, and a pressure distribution diagram is drawn for one of the pattern pitches.

[0034] The finished studded tires were subjected to ice and snow braking tests in accordance with the requirements of UNR164 regulations. The snow test results were: 1.40, and the regulatory limit is 1.18; the ice test results were: 1.15, and the regulatory limit is 1.07.

[0035] The finished studded tires were evaluated and the degree of wear of the studded tires on the road surface was tested. The road wear result was only 0.80g, which is below the limit of 1.1g.

[0036] The finished studded tires were subjected to a 25,000-kilometer road test. There were 12 finished studded tires on three road test vehicles. Only one nail fell off during the test, and the nail drop rate was only 0.4‰.

[0037] In the description of the present invention, it is necessary to understand that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A method for studding a tire, characterized in that: The following steps are involved: Taking the center line of the tire crown as the center of symmetry, the tire tread is divided into left and right sides, and each side is divided into 11 tracks; The shoulder is the first track, and the distance increases gradually as it approaches the center line; the distance between the fourth track, the fifth track and the sixth track is 4.5%-5.25% of the length of the tire grounding edge running surface, and the distance between the remaining tracks is 4%-4.25% of the length of the tire grounding edge running surface; The nail holes are opened on the track. No nail holes are opened within 5%-5.75% of the running length from the contact edge of the tire shoulder. The nail holes are located in the middle of the track line segment on the tread block through which the track passes, and the number of nail holes on the two symmetrical tracks is equal; Insert the pins into all the nail holes to form a studded tire.

2. A tire studding method according to claim 1, characterized in that: The difference in the number of nail holes among the sixth track, the seventh track and the eighth track shall not exceed 5.

3. A tire studding method according to claim 1 or 2, characterized in that: The positions of the nail holes in the cross-sectional direction of the tire are arranged along the pattern pitch. The difference in the number of nail holes in each contact area does not exceed 2. There are no pattern grooves or steel sheets within a radius of 10 mm around each pin position.

4. A tire studding method according to claim 3, characterized in that: The pin comprises a nail seat and a nail rod. The end of the nail rod is provided with a flange whose diameter is larger than that of the nail rod. The center of the top of the flange is provided with a nail core which is made of wear-resistant rubber material.

5. A tire studding method according to claim 4, characterized in that: The nail hole includes an upper edge, an extension part and a clamping part, and a circular chamfer transition is used between the upper edge and the extension part; the shape of the upper edge is adapted to the shape of the flange, the shape of the extension part is adapted to the shape of the nail rod, and the shape of the clamping part is adapted to the shape of the nail seat.

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