Size-adjustable tire forming cylinder

Abstract

The utility model discloses a size-adjustable tire forming cylinder, which relates to the technical field of forming machines and comprises a rotating structure and a collapsible structure. The expansion and contraction structure comprises forming plates evenly arranged in the circumferential direction of the main shaft, a cylinder is defined by all the forming plates, and the two ends of each forming plate are installed on the left supporting disc or the right supporting disc in a sliding mode respectively. An expansion and contraction driving device for driving the forming plate to slide is arranged between the forming plate and the main shaft and comprises a triangular block fixed at the bottom of the forming plate, a sliding block mounted on the main shaft in a sliding manner and a reciprocating operation mechanism for driving the sliding block to slide along the main shaft in a reciprocating manner; the triangular block ascends and descends along with reciprocating sliding of the sliding block. The stroke of the reciprocating operation mechanism is adjustable. The stroke of the reciprocating operation mechanism is controlled through the control system, and production of tire blanks of different specifications is completed, so that the number of the forming cylinders is reduced, the replacement frequency of the forming cylinders is effectively reduced, the production cost is reduced, and the production efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molding machines, and particularly relates to a tire molding cylinder with adjustable size. Background Art

[0002] During the tire production process, semi-finished products such as various layers of cord fabric and steel wires need to be successively adhered to a tire molding cylinder, and the semi-finished products are "assembled" into a tire embryo. For the existing molding cylinder, its expansion and contraction are controlled by a cylinder to control its maximum expanded diameter and minimum contracted diameter for producing and removing the tire embryo. The extending and contracting distances of the cylinder are the same, so its control stroke is fixed, that is, a tire molding cylinder can only produce tire embryos of one diameter.

[0003] In order to produce tire embryos of different specifications, a large number of tire molding cylinders need to be manufactured. The tire molding cylinder is not only expensive but also complex to replace. Frequent replacement of the tire molding cylinder not only increases the production cost but also reduces the production efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a tire molding cylinder with adjustable size, which is driven by a reciprocating running mechanism with adjustable stroke to control the molding cylinder to expand and contract to different degrees, so as to meet the production of tire embryos of various specifications without replacing the molding cylinder, reduce the number of molding cylinders, effectively reduce the replacement frequency of the molding cylinder, thereby reducing the production cost and improving the production efficiency.

[0005] To achieve the above purpose, the utility model provides a tire molding cylinder with adjustable size, including a rotating structure and an expansion and contraction structure; the rotating structure includes a left support disk and a right support disk arranged oppositely, a main shaft is fixedly installed in the central holes of the left support disk and the right support disk, the rotating structure is fixedly installed on the molding machine, and the molding machine drives the rotating structure to rotate; the expansion and contraction structure includes molding plates uniformly arranged in the circumferential direction of the main shaft, all the molding plates enclose a cylindrical shape, both ends of the molding plates are respectively slidably installed on the left support disk or the right support disk, and the sliding direction is along the radial direction of the main shaft; a telescopic driving device for driving the molding plates to slide is arranged between the molding plates and the main shaft, the telescopic driving device includes a triangular block fixed at the bottom of the molding plate, a sliding block slidably installed on the main shaft, and a reciprocating running mechanism for driving the sliding block to reciprocate along the main shaft, and the triangular block rises and falls as the sliding block reciprocates; the stroke of the reciprocating running mechanism is adjustable.

[0006] After adopting the above structure, input the model of the green tire to be produced into the control system, and control the stroke of the reciprocating mechanism through the control system, that is, the maximum expansion diameter and the minimum contraction diameter; by controlling different strokes, the production of green tires of different specifications is completed, thereby reducing the number of forming cylinders, effectively reducing the replacement frequency of the forming cylinders, reducing the production cost, and improving the production efficiency.

[0007] In order to achieve adjustable stroke of the reciprocating mechanism, the reciprocating mechanism includes a slide rod slidably installed in the central hole of the main shaft and an electric cylinder with adjustable stroke for driving the slide rod to reciprocate in the central hole of the main shaft. The sliding direction of the slide rod is towards the length direction of the main shaft; a kidney-shaped hole is arranged along the length direction of the main shaft, and the kidney-shaped hole communicates the slide rod with the sliding block. The slide rod and the sliding block are fixedly connected by a pin shaft, and the pin shaft is slidably installed in the kidney-shaped hole.

[0008] In order to ensure the stable driving force of the sliding block, multiple pin shafts are evenly arranged around the circumference of the main shaft, and one pin shaft is slidably installed in one kidney-shaped hole.

[0009] In order to achieve adjustable stroke of the reciprocating mechanism, in another embodiment, the reciprocating mechanism includes a lead screw rotatably installed in the central hole of the main shaft and a servo motor for driving the lead screw to rotate. A lead screw nut is screwed on the lead screw; a kidney-shaped hole is arranged along the length direction of the main shaft, and the kidney-shaped hole communicates the lead screw nut with the sliding block. The lead screw nut and the sliding block are fixedly connected by a pin shaft, and the pin shaft is slidably installed in the kidney-shaped hole.

[0010] In order to increase the force-bearing area between the sliding block and the triangular block, the sliding block is a conical block, and its taper is consistent with the bevel angle of the triangular block.

[0011] In order to reduce the friction force of the relative movement between the sliding block and the triangular block, a linear slide rail is installed on the triangular block, and the guide rail slider of the linear slide rail is fixed on the sliding block.

[0012] In order to avoid the adjustment failure of the reciprocating mechanism, a limit device is further included. The limit device includes a limit plate located on one side of the sliding block and slidably installed on the main shaft. When the sliding block slides towards the limit plate, the diameter of the forming cylinder gradually increases; several adjusting bolts are fixedly installed on the limit plate, and several adjusting bolts extend out of the left support plate or the right support plate to fix an adjusting plate. An adjusting nut is rotatably installed on the adjusting plate; a bolt column is fixed on the main shaft, and the adjusting nut is screwed on the bolt column.

[0013] In order to achieve stable support for the forming plate, support rods are respectively arranged at both ends of the inner side of the forming plate. Slide holes corresponding to the support rods are arranged on the left support plate and the right support plate, and the support rods are inserted into the slide holes and slide along the slide holes.

[0014] In order to reduce the friction between the forming plate and the sliding hole, rollers are rotatably installed at the bottom of the support rod, and the rollers roll up and down along the sliding hole.

[0015] After adopting the above technical solution, the beneficial effects of the present utility model are:

[0016] The tire forming cylinder with adjustable size of the present utility model solves the technical problem in the prior art that the stroke of the tire forming cylinder is not adjustable, resulting in that one forming cylinder can only produce one specification of tire embryo, so a large number of forming cylinders need to be made and the forming cylinders need to be frequently replaced, resulting in higher production costs and lower production efficiency. The present utility model is driven by a reciprocating running mechanism with adjustable stroke to control the forming cylinder to expand and contract to different degrees, so as to meet the production of tire embryos of various specifications without replacing the forming cylinder, reduce the number of forming cylinders, effectively reduce the replacement frequency of the forming cylinder, thereby reducing the production cost and improving the production efficiency. Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of a tire forming cylinder with adjustable size of the present utility model;

[0018] Figure 2 is an internal structural schematic diagram of the tire forming cylinder with adjustable size in Embodiment 1;

[0019] Figure 3 is an internal structural schematic diagram of the tire forming cylinder with adjustable size in Embodiment 2.

[0020] In the figure, 11, left support disk; 12, right support disk; 13, main shaft; 131, kidney-shaped hole; 21, forming plate; 211, support rod; 31, triangular block; 311, linear slide rail; 32, sliding block; 41, lead screw; 411, lead screw nut; 42, pin shaft; 51, limiting plate; 52, adjusting bolt; 53, adjusting plate; 531, adjusting nut; 54, bolt column. Detailed Embodiments

[0021] The present utility model will be further described below with reference to the drawings.

[0022] The orientations involved in this specification are based on the orientations when the tire forming cylinder with adjustable size of the present utility model is working properly, without limiting its orientations during storage and transportation, only representing relative position relationships and not absolute position relationships.

[0023] Embodiment 1:

[0024] As Figure 1 and Figure 2As shown together, an adjustable-size tire forming cylinder includes a rotating structure and an expanding and contracting structure; the rotating structure includes a left support disk 11 and a right support disk 12 which are oppositely arranged. A main shaft 13 is fixedly installed in the central holes of the left support disk 11 and the right support disk 12, and the main shaft 13 fixes the left support disk 11 and the right support disk 12 into a whole. One end of the main shaft 13 extends out of the left support disk 11 or the right support disk 12 and is fixedly installed on the rotating shaft of the forming machine, and the forming machine drives the main shaft 13 to rotate; thus, each semi-finished product is "assembled" into a tire embryo.

[0025] The expanding and contracting structure includes forming plates 21 uniformly arranged in the circumferential direction of the main shaft 13. All the forming plates 21 enclose a cylindrical shape. The two ends of the forming plate 21 are respectively slidably installed on the left support disk 11 or the right support disk 12, and its sliding direction is along the radial direction of the main shaft 13. Support rods 211 are respectively arranged at the two inner ends of the forming plate 21. Slide holes corresponding to the support rods 211 are arranged on the left support disk 11 and the right support disk 12. The opening direction of the slide holes is along the radial direction of the left support disk 11 or the right support disk 12. The support rods 211 are inserted into the slide holes and slide along the slide holes. The depth of the slide holes is greater than the difference between the maximum expanding radius of the largest tire embryo that the forming cylinder can produce and the minimum contracting radius of the smallest tire embryo that the forming cylinder can produce. Thus, when adjusting the production range of the forming cylinder, the situation of being unable to adjust the production radius due to the bottom and top of the slide holes being restricted will not occur.

[0026] In order to reduce the friction force, rollers are rotatably installed at the bottom of the support rods 211. The rollers roll up and down along the slide holes. Through the roller design, the sliding friction is changed to rolling friction, thereby reducing the damage of the device caused by friction.

[0027] An expanding and contracting driving device for driving the forming plate 21 to slide is arranged between the forming plate 21 and the main shaft 13. The expanding and contracting driving device includes a triangular block 31 fixed at the bottom of the forming plate 21, a sliding block 32 slidably installed on the main shaft 13, and a reciprocating running mechanism for driving the sliding block 32 to slide along the main shaft 13. The stroke of the reciprocating running mechanism is adjustable. By making the stroke of the reciprocating running mechanism adjustable, the expanding and contracting range (i.e., the maximum expanding diameter and the minimum contracting diameter) of the forming plate 21 can be adjusted according to the specifications of the tire embryos to be produced, so that different specifications of tire embryos can be produced with the same forming cylinder.

[0028] The contact position between the bottom of the triangular block 31 and the sliding block 32 is arranged as an inclined surface. Therefore, as the sliding block 32 slides horizontally, the triangular block 31 is pushed to rise and fall. In order to ensure the stable support of the triangular block 31 for the forming plate 21, the triangular block 31 is installed at the middle position of the forming plate 21.

[0029] Further, the sliding block 32 is a conical block, and its taper is the same as the bevel angle of the triangular block 31. By making the bevel angle of the sliding block 32 the same as that of the triangular block 31, when the sliding block 32 pushes the triangular block 31 to move up and down, the line force is changed to surface force, increasing the force-bearing area, thereby reducing the damage of the sliding block 32 and the triangular block 31 due to excessive pressure.

[0030] On the premise of increasing the force-bearing area between the sliding block 32 and the triangular block 31, it is bound to increase a certain amount of friction. In order to reduce the adjustment force, a linear slide rail 311 is installed on the triangular block 31, and the guide rail slider of the linear slide rail 311 is fixed on the sliding block 32. Thus, it is realized that the triangular block 31 always moves up and down following the sliding block 32.

[0031] When the linear slide rail 311 is not used, in order to ensure that the triangular block 31 always abuts against the outside of the sliding block 32 and moves up and down as the sliding block 32 moves, springs or elastic bands are arranged between all the triangular blocks 31 to press all the triangular blocks 31 against the outside of the sliding block 32.

[0032] One embodiment of the reciprocating mechanism (not shown in the figure): The reciprocating mechanism includes a slide rod slidably installed in the central hole of the main shaft 13 and an electric cylinder with adjustable stroke for driving the slide rod to reciprocate in the central hole of the main shaft 13. The sliding direction of the slide rod is towards the length direction of the main shaft 13, and a waist-shaped hole 131 is arranged along the length direction of the main shaft 13. The length of the waist-shaped hole 131 is set according to the maximum expansion radius of the largest tire blank that the forming cylinder can produce and the minimum contraction radius of the smallest tire blank that the forming cylinder can produce, and the moving range of the sliding block 32, so as to avoid interference of the waist-shaped hole 131 during adjustment and cause the range adjustment to fail. The waist-shaped hole 131 communicates the slide rod with the sliding block 32. A fixed sleeve is sleeved on the slide rod, and the fixed sleeve and the sliding block 32 are fixedly connected by a pin shaft 42. The pin shaft 42 is slidably installed in the waist-shaped hole 131. By freely adjusting the extended length of the electric cylinder with adjustable stroke within a certain range, the maximum expansion diameter and the minimum retraction diameter of the forming cylinder can be adjusted according to the expansion and contraction requirements of different specifications of tire blanks, and the production of different specifications of tire blanks can be completed.

[0033] As Figure 2As shown in the figure, another embodiment of the reciprocating mechanism. The reciprocating mechanism includes a lead screw 41 rotatably installed in the central hole of the main shaft 13 and a servo motor for driving the rotation of the lead screw 41. The lead screw 41 is rotatably installed in the central hole of the main shaft 13 through bearings, and a lead screw nut 411 is screwed on the lead screw 41. A waist-shaped hole 131 is provided along the length direction of the main shaft 13, and the setting requirements of the waist-shaped hole 131 are the same as those described above. The waist-shaped hole 131 communicates the lead screw nut 411 with the sliding block 32, and the lead screw nut 411 and the sliding block 32 are fixedly connected through a pin shaft 42, and the pin shaft 42 is slidably installed in the waist-shaped hole 131. The servo motor controls the number of rotations of the lead screw 41 according to the requirements of tire blanks of different specifications, and controls the sliding range of the lead screw nut 411, so as to adjust the maximum expansion diameter and the minimum retraction diameter of the forming cylinder according to the expansion and contraction requirements of tire blanks of different specifications, and complete the production of tire blanks of different specifications.

[0034] In the above two embodiments of the reciprocating mechanism, the installation position of the electrically actuated cylinder or the servo motor with adjustable stroke can be fixed on the main shaft 13, or can be fixed on the left support disk 11, and can also refer to the installation position of the cylinder of the existing ordinary forming cylinder. For the power transmission among them, a slip ring can be used to ensure it or other connection structures.

[0035] Furthermore, in order to ensure the sliding operation stability of the sliding block 32 and reduce the friction force, a sliding sleeve is sleeved on the main shaft 13, and the sliding block 32 is fixed on the outer side of the sliding sleeve. The main shaft 13 is fixed on the sliding sleeve. Further, in order to ensure the balance of the driving force, a plurality of pin shafts 42 are evenly arranged around the circumference of the main shaft 13, and one pin shaft 42 is slidably installed in one waist-shaped hole 131.

[0036] The working principle of this embodiment:

[0037] Input the model of the tire blank to be produced into the control system, control the operation data of the reciprocating mechanism through the control system, ensure the sliding range of the sliding block 32, adjust the maximum expansion diameter and the minimum retraction diameter of the forming cylinder, and complete the production of tire blanks of different specifications.

[0038] Embodiment Two:

[0039] In order to prevent the reciprocating mechanism from failing, resulting in the maximum diameter during its expansion being greater than the preset diameter, so this embodiment is further improved on the basis of Embodiment One.

[0040] As Figure 3 shown, a tire forming cylinder with adjustable size further includes a limiting device. The limiting device includes a limiting plate 51 arranged on one side of the sliding block 32. When the sliding block 32 slides towards the limiting plate 51, the triangular block 31 slides away from the main shaft 13, that is, the diameter of the forming cylinder gradually becomes larger until it runs to the preset position.

[0041] The limiting plate 51 is slidably mounted on the main shaft 13, and a number of adjusting bolts 52 are fixedly mounted thereon. The number of adjusting bolts 52 extends out of the left support disk 11 or the right support disk 12 (the right support disk 12 in this embodiment), and an adjusting plate 53 is fixed. An adjusting nut 531 is rotatably mounted on the adjusting plate 53; a bolt column 54 is fixed on the main shaft 13, and the bolt column 54 extends out of the right support disk 12. The adjusting nut 531 is screwed on the bolt column 54. By rotating the adjusting nut 531, the position control of the adjusting plate 53 on the bolt column 54 is realized, so as to control the position of the limiting plate 51. The rightmost sliding range of the sliding block 32 is limited by the limiting plate 51, so as to control the maximum expansion diameter of the forming cylinder, and avoid the over-position operation of the reciprocating mechanism, resulting in an oversized and unqualified diameter of the produced tire embryo.

[0042] Before adjusting the specifications of the produced tire embryo, the limiting device is adjusted first, so as to add another insurance measure for Embodiment 1.

[0043] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An adjustable-size tire building drum, characterized in that: It includes a rotating structure and an expanding and contracting structure; The rotating structure includes a left support disk and a right support disk which are oppositely arranged. A main shaft is fixedly installed in the central holes of the left support disk and the right support disk. The rotating structure is fixedly installed on a molding machine, and the molding machine drives the rotating structure to rotate; The expanding and contracting structure includes forming plates uniformly arranged in the circumferential direction of the main shaft. All the forming plates enclose a cylindrical shape. The two ends of each forming plate are respectively slidably installed on the left support disk or the right support disk, and the sliding direction is along the radial direction of the main shaft; A telescopic driving device for driving the forming plate to slide is arranged between the forming plate and the main shaft. The telescopic driving device includes a triangular block fixed at the bottom of the forming plate, a sliding block slidably installed on the main shaft, and a reciprocating mechanism for driving the sliding block to reciprocate along the main shaft. The triangular block rises and falls as the sliding block reciprocates; The stroke of the reciprocating mechanism is adjustable.

2. The adjustable-size tire forming cylinder according to claim 1, characterized in that: The reciprocating mechanism includes a slide rod slidably installed in the central hole of the main shaft and an electric cylinder with an adjustable stroke for driving the slide rod to reciprocate in the central hole of the main shaft. The sliding direction of the slide rod is towards the length direction of the main shaft; A kidney-shaped hole is arranged along the length direction of the main shaft. The kidney-shaped hole connects the slide rod and the sliding block. The slide rod and the sliding block are fixedly connected by a pin shaft, and the pin shaft is slidably installed in the kidney-shaped hole.

3. The adjustable - sized tire forming cylinder according to claim 2, wherein: A plurality of pin shafts are uniformly arranged around the circumference of the main shaft, and one pin shaft is slidably installed in one kidney-shaped hole.

4. The adjustable-size tire forming cylinder according to claim 2, wherein: The reciprocating mechanism includes a lead screw rotatably installed in the central hole of the main shaft and a servo motor for driving the lead screw to rotate. A lead screw nut is screwed on the lead screw; A kidney-shaped hole is arranged along the length direction of the main shaft. The kidney-shaped hole connects the lead screw nut and the sliding block. The lead screw nut and the sliding block are fixedly connected by a pin shaft, and the pin shaft is slidably installed in the kidney-shaped hole.

5. A tire forming cylinder with adjustable size according to claim 1, characterized in that: The sliding block is a conical block, and its taper is the same as the bevel angle of the triangular block.

6. The adjustable-sized tire forming cylinder according to claim 5, wherein: A linear slide rail is installed on the triangular block, and the guide rail slider of the linear slide rail is fixed on the sliding block.

7. The adjustable-size tire forming cylinder according to claim 1, wherein: It also includes a limiting device. The limiting device includes a limiting plate located on one side of the sliding block and slidably installed on the main shaft. When the sliding block slides towards the limiting plate, the diameter of the forming cylinder gradually increases; A plurality of adjusting bolts are fixedly installed on the limiting plate. The plurality of adjusting bolts extend out of the left support disk or the right support disk and are fixed with an adjusting plate. An adjusting nut is rotatably installed on the adjusting plate; A bolt column is fixed on the main shaft, and the adjusting nut is installed on the bolt column.

8. An adjustable-size tire forming cylinder according to claim 1, characterized in that: Support rods are respectively arranged at the inner ends of the two sides of the forming plate. Slide holes corresponding to the support rods are arranged on the left support disk and the right support disk. The support rods are inserted into the slide holes and slide along the slide holes.

9. The adjustable-size tire forming cylinder according to claim 8, wherein: Rollers are rotatably installed at the bottom of the support rods, and the rollers roll up and down along the slide holes.

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