Run-flat tire capable of improving high-speed performance and tread processing equipment of run-flat tire

Abstract

The invention relates to the technical field of tread processing, in particular to a run-flat tire capable of improving high-speed performance and tread processing equipment thereof, specifically comprising a base and a top frame, the base is fixedly mounted at the bottom of the top frame, two sliding seats are arranged at the top of the base, and sliding rails are fixedly mounted at the tops of the sliding seats through cushion blocks; a sliding bottom plate is slidably connected into the sliding rail, two arc-shaped rails are fixedly installed on the top of the sliding bottom plate, a support is fixedly installed on one side of the top of the sliding seat, and a shaft seat is fixedly installed on the top of the cushion block. The arc-shaped expansion plate is divided into two parts to synchronously expand to eliminate the gap, and the arc-shaped frame with the guide rollers is arranged, so that the problems of deformation, untight attachment and the like when an outer coating is attached to a tire are solved, and the attachment precision and the tire quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tread processing, in particular to a run-flat tire with improved high-speed performance and a tread processing device thereof. Background Art

[0002] Automobile tires have many important functions. They not only support the weight of the vehicle, including itself, passengers and cargo, and evenly distribute the pressure on the ground, but also transmit the power generated by the engine to drive the vehicle forward, and use the friction with the ground to stop the vehicle during braking. They can also change the direction of the vehicle by steering, and rely on their own elastic buffering and shock absorption to reduce the impact of vibrations caused by uneven roads on the vehicle body and passengers. At the same time, they rely on pattern design to increase friction with the ground to ensure the stability and safety of the vehicle on various road surfaces. They play an indispensable and key role in the operation of the car.

[0003] In the tire production process, there are many problems in the process of using rollers to fit the outer layer after the outer layer is put on the outside of the tire: on the one hand, due to the elastic properties of the outer layer material and the tire itself, when they are actually fitted at high speed, they are easily changed from round to elliptical or other shapes due to the influence of centrifugal force and mechanical stress, making it difficult to fit them tightly and evenly. The fitting is often not tight, there are gaps, and wrinkles, stretching and other undesirable phenomena will occur, which will not only destroy the flatness and integrity of the tire surface, but also reduce its wear resistance, stability and safety in subsequent use, shortening its service life;

[0004] On the other hand, there are a lot of gaps between the arc plates of the traditional tire inner circle support device, which makes it impossible for the tire to obtain uniform and stable support force when fitting. During high-speed rotation, these gaps make the tire lack effective support in some parts, aggravating the degree of tire deformation, and may also cause vibration and deviation, further increasing the difficulty of fitting the outer cover and the tire, seriously affecting the overall quality and performance of the tire.

[0005] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0006] The object of the present invention is to provide a run-flat tire with improved high-speed performance and a tread processing device thereof, so as to solve the problems mentioned in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a tread processing device for a run-flat tire with improved high-speed performance, comprising a base and a top frame, wherein the base is fixedly mounted on the bottom of the top frame, two sliding seats are arranged on the top of the base, a slide rail is fixedly mounted on the top of the sliding seat through a pad, a slide bottom plate is slidably connected inside the slide rail, and two arc-shaped tracks are fixedly mounted on the top of the slide bottom plate;

[0008] A support is fixedly installed on one side of the top of the sliding seat, and a shaft seat is fixedly installed on the top of the pad. The interior of the shaft seat is movably connected with a rotating shaft through a bearing. A limiting rotating rod is provided at one end of the shaft seat, and one end of the limiting rotating rod is fixedly connected to the rotating shaft. A positioning shaft is fixedly connected to the end of the limiting rotating rod away from the rotating shaft, and an arc-shaped expansion plate arranged in a ring array with the center of the positioning shaft cross section as the center of a circle is provided on the outer side of the positioning shaft.

[0009] Preferably, a sliding sleeve 1 is slidably connected to the outer side of the limit rotating rod, and two annular hoops are fixedly mounted on the outer side of the sliding sleeve 1, and the annular hoops are slidably connected to a corresponding arc track arranged below the annular hoops.

[0010] Preferably, the outer side of the positioning shaft is slidably connected with a second sleeve, and one end of the second sleeve is fixedly connected to the first sleeve, one end of the positioning shaft is fixedly connected with a bearing block, and the side walls of the two bearing blocks are respectively fixedly connected with matching plug sleeves and plug blocks.

[0011] Preferably, multiple groups of brackets are fixedly installed at equal intervals on the outer sides of the second sliding sleeve and the bearing block, and the first abutment rod and the second abutment rod are rotatably connected to the brackets of the second sliding sleeve and the bearing block respectively;

[0012] The inner side wall of the arc expansion plate is fixedly installed with a limit sliding frame corresponding to the number of abutment rods 1, the end of abutment rod 2 away from the bearing block is rotatably connected to the inner side wall of the arc expansion plate, and the end of abutment rod 1 away from the sliding sleeve 2 is slidably connected in the limit sliding frame.

[0013] Preferably, a lower electric push rod and an upper electric push rod are fixedly installed at the midpoint of the top of the base and the midpoint of the top inner wall of the top frame, and an arc frame is fixedly installed at the output ends of the lower electric push rod and the upper electric push rod, and a plurality of guide rollers are movably connected inside the arc frame through bearings.

[0014] Preferably, both side walls of the arc-shaped frame connected to the bottom end of the upper electric push rod are fixedly connected to a support frame, a rotating rod is rotatably connected inside the support frame, and a clamping roller is installed at the bottom end of the rotating rod through a frame, and an electric push rod 1 is rotatably connected to the outer wall of the support frame, and the output end of the electric push rod 1 is rotatably connected to the rotating rod.

[0015] Preferably, a motor for driving the rotating shaft to rotate is installed on the outer side of one of the supports, a slide groove one is symmetrically opened on the top of the base, and the sliding seat is slidably connected in the slide groove one.

[0016] The present invention also proposes a run-flat tire with improved high-speed performance, which is made using a tread processing device for a run-flat tire with improved high-speed performance. The tire includes a tread, an inner liner and a sidewall. A cap layer, a belt layer and a cord layer are arranged between the tread and the inner liner from the outside to the inside. A support rubber for run-flat is provided at the sidewall between the cord layer and the inner liner.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention designs the arc expansion plate used to support the inner circle of the tire into two parts, which are synchronously expanded by corresponding driving mechanisms, thereby completely eliminating a series of disadvantages of the traditional tire inner circle expansion mechanism caused by the gap between the arc plates. By closely fitting the inner circle of the tire, a uniform and stable supporting force is provided for the tire during the high-speed rotation and fitting process, effectively suppressing the tire deformation caused by the lack of local support, greatly reducing the problems of looseness, wrinkles and stretching between the outer cover and the tire during fitting, ensuring that the two can fit tightly and accurately, and significantly improving the molding quality and overall performance of the tire.

[0019] 2. The present invention also arranges arc frames at the upper and lower positions of the tire, and installs guide rollers inside the arc frames. These guide rollers form a fully wrapped limiting system. Whether the tire itself is rotating at high speed or the outer covering layer is moving during the bonding process, it can be accurately guided and limited. In the process of the tire rotating and bonding the outer covering layer, the guide rollers can effectively resist the influence of centrifugal force and mechanical stress on the outer covering layer and the tire shape, preventing it from changing from a circle to an ellipse or other irregular shape, further enhancing the bonding accuracy between the outer covering layer and the tire, and effectively ensuring the flatness and integrity of the tire surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the connection between the limit rotating rod and the positioning shaft in the present invention;

[0023] Figure 3 It is a schematic diagram of the arc expansion plate structure in the present invention;

[0024] Figure 4 It is a structural schematic diagram of a sliding sleeve in the present invention;

[0025] Figure 5 It is a schematic diagram of the arc track structure in the present invention;

[0026] Figure 6 It is a schematic diagram of the annular hoop structure in the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the pressing roller in the present invention;

[0028] Figure 8 It is a cross-sectional view of the structure of a run-flat tire with improved high-speed performance according to the present invention.

[0029] : Reference numerals: 100, base; 200, top frame; 300, sliding seat; 401, slide rail; 402, sliding bottom plate; 403, arc track; 501, shaft seat; 502, limit rotating rod; 503, positioning shaft; 504, arc expansion plate; 600, electric push rod one; 700, plug-in sleeve; 8, plug-in block; 901, sliding sleeve one; 902, sliding sleeve two; 903, annular hoop; 10, abutment rod one; 11, abutment rod two; 12, limit sliding frame; 13, guide roller; 14, support frame; 15, abutment roller; 16, lower electric push rod; 17, upper electric push rod; 1, tread; 2, inner liner; 3, sidewall; 4, cap layer; 5, belt layer; 6, cord layer; 7, supporting rubber. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1: Figure 1-Figure 8 As shown, a tread processing device for a run-flat tire with improved high-speed performance includes a base 100 and a top frame 200. The base 100 is fixedly mounted on the bottom of the top frame 200. Two sliding seats 300 are arranged on the top of the base 100. A motor for driving a rotating shaft to rotate is installed on the outer side of one of the supports. A slide groove 1 is symmetrically opened on the top of the base 100, and the slide seat 300 is slidably connected in the slide groove 1.

[0032] like Figure 1 As shown, the two slide grooves on the top of the base 100 are both movably connected with threaded rods through bearings, the sliding seat 300 is rotatably connected with the threaded rods, and a motor for driving the threaded rods to rotate is fixedly installed on the outer side of the base 100, and the threaded rods are driven to rotate by the motor, thereby realizing the reciprocating movement of the sliding seat 300;

[0033] A slide rail 401 is fixedly installed on the top of the sliding seat 300 through a pad, and a slide base plate 402 is slidably connected inside the slide rail 401. Two arc tracks 403 are fixedly installed on the top of the slide base plate 402. It should be explained here that a threaded rod is also movably connected inside the slide rail 401 through a bearing, and a motor for driving the threaded rod inside the slide rail 401 to rotate is also installed on the outside of the slide rail 401. The motor drives the threaded rod inside the slide rail 401 to further drive the slide base plate 402 to reciprocate.

[0034] A support is fixedly installed on one side of the top of the sliding seat 300, and an axle seat 501 is fixedly installed on the top of the pad. The interior of the axle seat 501 is movably connected to a rotating shaft through a bearing. A limiting rotating rod 502 is provided at one end of the axle seat 501, and one end of the limiting rotating rod 502 is fixedly connected to the rotating shaft, and a positioning shaft 503 is fixedly connected to the end of the limiting rotating rod 502 away from the rotating shaft. An arc expansion plate 504 is provided on the outer side of the positioning shaft 503, and the center of the cross-section of the positioning shaft 503 is the center of the circle and is arranged in a circular array. The arc expansion plate 504 is used to support the inner wall of the tire.

[0035] The outer side of the limiting rotating rod 502 is slidably connected with a sliding sleeve 901, and the outer side of the sliding sleeve 901 is sleeved and fixed with two annular hoops 903. The annular hoops 903 are slidably connected to the corresponding arc track 403 arranged below. The arrangement of the arc track 403 can not only realize the movement of the sliding sleeve 901 through the mutual cooperation between the arc track 403 and the annular hoop 903, but also provide auxiliary support during the rotation of the sliding sleeve 901.

[0036] The outer side of the positioning shaft 503 is slidably connected with a sleeve 2 902, and one end of the sleeve 2 902 is fixedly connected to the sleeve 1 901, and one end of the positioning shaft 503 is fixedly connected to a bearing block, and the side walls of the two bearing blocks are respectively fixedly connected with a matching plug-in sleeve 700 and a plug-in block 8, and the cross-sections of the plug-in sleeve 700 and the plug-in block 8 are polygonal. When the plug-in block 8 enters the inside of the plug-in sleeve 700, the external motor drives the limit rotating rod 502 on one side, thereby driving the limit rotating rod 502 on the other side to rotate synchronously.

[0037] Multiple sets of brackets are fixedly installed at equal intervals on the outer sides of the second sliding sleeve 902 and the bearing block, and the brackets arranged in the second sliding sleeve 902 and the bearing block are rotatably connected to the first abutment rod 10 and the second abutment rod 11 respectively;

[0038] The inner wall of the arc expansion plate 504 is fixedly installed with a limit sliding frame 12 corresponding to the number of abutment rods 10. The end of abutment rod 11 away from the supporting block is rotatably connected to the inner wall of the arc expansion plate 504, and the end of abutment rod 10 away from the sliding sleeve 902 is slidably connected in the limit sliding frame 12.

[0039] A lower electric push rod 16 and an upper electric push rod 17 are fixedly installed at the midpoint of the top of the base 100 and the midpoint of the top inner wall of the top frame 200. An arc frame is fixedly installed at the output ends of the lower electric push rod 16 and the upper electric push rod 17. Multiple groups of guide rollers 13 are movably connected to the inside of the arc frame through bearings. The lower electric push rod 16 and the upper electric push rod 17 control the multiple groups of guide rollers 13 to make surrounding contact with the tire through the arc frame setting;

[0040] The two side walls of the arc-shaped frame connected to the bottom end of the upper electric push rod 17 are fixedly connected to the support frame 14, a rotating rod is rotatably connected inside the support frame 14, and a pressing roller 15 is installed at the bottom end of the rotating rod through the frame, and an electric push rod 600 is rotatably connected to the outer side wall of the support frame 14, and the output end of the electric push rod 600 is rotatably connected to the rotating rod, and the pressing roller 15 is rotated and used to press against the outer side of the tread rubber (outer covering layer);

[0041] First, the pre-prepared outer covering layer (tread rubber) is put on the outside of the tire body, and then pressure is applied through the pressing roller 15 to make the outer covering layer fit tightly with the tire body. The function of the roller is to exhaust the air between the pressing roller 15 and the tire body to ensure that there is no gap between the two, making the fit more firm and smooth.

[0042] First, the tire is placed vertically above the midpoint of the base 100 through an external mechanism, and then the outer covering layer is sleeved on the outer side of the tire. At this time, the inner wall of the outer covering layer is bonded to the tire, and the center of the tire and the center of the limit rotating rod 502 are on the same horizontal line. Then, the motors at both ends of the base 100 are started, and the motors drive the threaded rods in the slide grooves to rotate, thereby further driving the sliding seat 300 to move above the base 100 until the arc expansion plates 504 on both sides of the base 100 are located on the inner side of the tire.

[0043] Furthermore, the motor on the outside of the slide rail 401 is started, and the motor drives the threaded rod inside the slide rail 401 to rotate, further driving the slide base 402 and the arc track 403 to move synchronously. The arc track 403 cooperates with the annular hoop 903 to drive the sliding sleeve 1 901 and the sliding sleeve 2 902 to move synchronously. The sliding sleeve 1 901 slides on the outside of the limit rotating rod 502, and the sliding sleeve 2 902 slides on the outside of the positioning shaft 503.

[0044] As the second sliding sleeve 902 gradually approaches the bearing block, the abutting rod 10 and the second abutting rod 11 are relatively deflected, and one end of the abutting rod 10 slides synchronously in the limit sliding frame 12, thereby further driving the arc expansion plate 504 to move outward until the arc expansion plate 504 is pressed against the inner wall of the tire, and at this time, the arc expansion plates 504 respectively arranged on the two sliding seats 300 fit each other tightly, thereby eliminating the problem of a large amount of gap between the arc plates of the traditional tire inner circle support device, which makes it impossible for the tire to obtain uniform and stable support force when fitting, resulting in aggravated tire deformation.

[0045] After the arc expansion plate 504 effectively and tightly supports the inner wall of the tire, the lower electric push rod 16 and the upper electric push rod 17 respectively drive the guide roller 13 to approach the tire through the arc frame until the ends of the two arc frames contact each other. At this time, the tire and the outer covering are pressed tightly by the guide roller 13. In order to further improve the pressing accuracy, the midpoint position of the guide roller 13 coincides with the midpoint position of the width of the tire and the outer covering. At this time, the tire and the outer covering are effectively and seamlessly supported on the arc expansion plate 504, and are further fitted by the guide roller 13. Subsequently, the corresponding motor drives the rotating shaft, the limiting rotating rod 502, the positioning shaft 503, the plug-in block 8 and the plug-in sleeve 700 to cooperate with each other, thereby driving the tire and the outer covering to rotate synchronously, and the pressing roller 15 fits the tire and the outer covering under the action of the electric push rod 600.

[0046] Embodiment 2: Figure 8 As shown, a run-flat tire with improved high-speed performance includes a tread 1, an inner liner 2 and a sidewall 3. A cap layer 4, a belt layer 5 and a carcass layer 6 are arranged between the tread 1 and the inner liner 2 from the outside to the inside. A support rubber 7 for run-flat is provided at the sidewall 3 between the carcass layer 6 and the inner liner 2.

[0047] The tire section height SH is divided into a pattern cut-off point, a point 5 mm below the end point of the cord wrapping, and an end point of the apex rubber in sequence from the shoulder to the tire toe. The lateral distance A from the upper end point of the support rubber 7 to the end point of the belt layer 5 on the same side close to the shoulder is 10-20 mm, and the vertical distance B from the lower end point of the support rubber 7 to the tire toe is 15-25 mm. The thickness T1 of the support rubber 7 at the pattern cut-off point, the thickness T2 of the support rubber 5 mm below the end point of the cord wrapping, and the thickness T3 of the support rubber at the end point of the apex rubber have a relationship of T2>T3>T1, and T2-T1≦2 mm;

[0048] At the tire section height SH, from the center to the toe direction, the tire center thickness F, the shoulder total thickness G, the total thickness at the pattern end point C, the total thickness D 5mm below the cord turn-up end point and the total thickness E at the apex rubber end point are divided in sequence, with the relationship of F>G>C>D>E, and FE≦2mm.

[0049] The width of the cap layer 4 exceeds the width of the belt layer 5 by more than 6 mm and less than 10 mm.

[0050] The run-flat tire with improved high-speed performance has an overall thickness of each area of ​​the sidewall 3 that is weaker than the tread, and the overall thickness gradually becomes thinner from the center of the tire to the toe. During the high-speed test of the tire, the flexural resistance of the sidewall 3 is maintained, effectively avoiding premature damage to the sidewall 3 due to increased tire temperature, thereby improving the high-speed performance of the run-flat tire.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A tread processing device for a run-flat tire with improved high-speed performance, comprising a base (100) and a top frame (200), wherein the base (100) is fixedly mounted on the bottom of the top frame (200), and characterized in that: Two sliding seats (300) are arranged on the top of the base (100); a sliding rail (401) is fixedly installed on the top of the sliding seat (300) via a cushion block; a sliding bottom plate (402) is slidably connected inside the sliding rail (401); and two arc-shaped rails (403) are fixedly installed on the top of the sliding bottom plate (402); A support is fixedly installed on one side of the top of the sliding seat (300), and an axle seat (501) is fixedly installed on the top of the cushion block. The interior of the axle seat (501) is movably connected to a rotating shaft via a bearing. A limit rotating rod (502) is provided at one end of the axle seat (501), and one end of the limit rotating rod (502) is fixedly connected to the rotating shaft. A positioning shaft (503) is fixedly connected to the end of the limit rotating rod (502) away from the rotating shaft. An arc expansion plate (504) arranged in a ring array is provided on the outer side of the positioning shaft (503) with the center of the cross section of the positioning shaft (503) as the center of a circle.

2. The tread processing equipment for a run-flat tire with improved high-speed performance according to claim 1, characterized in that: The outer side of the limit rotating rod (502) is slidably connected to a sliding sleeve (901), and the outer side of the sliding sleeve (901) is sleeved with two annular hoops (903) fixedly installed, and the annular hoops (903) are slidably connected to the corresponding arc track (403) arranged below it.

3. The tread processing equipment for a run-flat tire with improved high-speed performance according to claim 1, characterized in that: The outer side of the positioning shaft (503) is slidably connected to a second sliding sleeve (902), and one end of the second sliding sleeve (902) is fixedly connected to the first sliding sleeve (901). One end of the positioning shaft (503) is fixedly connected to a bearing block, and the side walls of the two bearing blocks are respectively fixedly connected to a plug-in sleeve (700) and a plug-in block (8) that cooperate with each other.

4. The tread processing equipment for a run-flat tire with improved high-speed performance according to claim 3, characterized in that: A plurality of brackets are fixedly installed at equal intervals on the outer sides of the second sliding sleeve (902) and the bearing block, and abutment rods 1 (10) and 2 (11) are rotatably connected to the brackets of the second sliding sleeve (902) and the bearing block respectively; The inner wall of the arc expansion plate (504) is fixedly installed with a limit sliding frame (12) corresponding to the number of abutment rods (10), and the end of the abutment rod (11) away from the bearing block is rotatably connected to the inner wall of the arc expansion plate (504), and the end of the abutment rod (10) away from the sliding sleeve (902) is slidably connected in the limit sliding frame (12).

5. The tread processing equipment for a run-flat tire with improved high-speed performance according to claim 1, characterized in that: A lower electric push rod (16) and an upper electric push rod (17) are fixedly mounted at the midpoint of the top of the base (100) and the midpoint of the top inner wall of the top frame (200); an arc frame is fixedly mounted at the output ends of the lower electric push rod (16) and the upper electric push rod (17); and a plurality of guide rollers (13) are movably connected inside the arc frame via bearings.

6. The tread processing equipment for a run-flat tire with improved high-speed performance according to claim 5, characterized in that: The two side walls of the arc-shaped frame connected to the bottom end of the upper electric push rod (17) are fixedly connected to a support frame (14), a rotating rod is rotatably connected inside the support frame (14), and a clamping roller (15) is installed at the bottom end of the rotating rod through a frame, and an electric push rod 1 (600) is rotatably connected to the outer side wall of the support frame (14), and the output end of the electric push rod 1 (600) is rotatably connected to the rotating rod.

7. The tread processing equipment for a run-flat tire with improved high-speed performance according to claim 1, characterized in that: A motor for driving the rotating shaft to rotate is installed on the outer side of one of the supports, a slide groove 1 is symmetrically provided on the top of the base (100), and the sliding seat (300) is slidably connected in the slide groove 1.

8. A run-flat tire with improved high-speed performance, manufactured by using the tread processing equipment for a run-flat tire with improved high-speed performance as claimed in any one of claims 1 to 7, characterized in that: The tire comprises a tread (1), an inner liner (2) and a sidewall (3); a cap layer (4), a belt layer (5) and a cord layer (6) are arranged in sequence from the outside to the inside between the tread (1) and the inner liner (2); and a support rubber (7) for run-flat is provided at the sidewall (3) between the cord layer (6) and the inner liner (2).

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