Tire building drum capable of stretching out and drawing back in radial direction

Abstract

The tire building drum comprises a rotating shaft, a sliding groove is formed in the rotating shaft, an electric telescopic rod is installed on the inner wall of one side of the sliding groove, the telescopic end of the electric telescopic rod is fixedly connected with a sliding column, and the outer wall of the sliding column is fixedly connected with a plurality of first fixing plates; one side of each first fixing plate extends to the outside, the other side of each first fixing plate extends to the outside, a plurality of forming plates are arranged on the outer wall of the rotating shaft, a second fixing plate is fixedly connected to one side wall of each forming plate, and a plurality of connecting rods are rotationally connected to the outer wall of each first fixing plate; and the other end of each connecting rod is rotationally connected with the outer wall of the corresponding second fixing plate, and the outer wall of the rotating shaft is fixedly connected with two side drums. Through cooperation of structures such as a gear ring, a first gear and a rack, the multiple limiting plates can be attached to the surface of the tire, the tire is limited to expand to the preset size, tire size inconsistency is avoided, and the tire forming quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire building drums, in particular to a radially retractable tire building drum. Background Art

[0002] Tire building drums are mainly used in the tire building process to help combine and shape various tire components. During operation, the drum expands and contracts to fit the tire components onto its surface, determine the internal shape and size of the tire, and ensure the relative positions of the tire components are accurate, providing the basis for manufacturing high-quality tires with uniform specifications.

[0003] However, in the process of manufacturing tires with a building drum, it is necessary to repeatedly fill and release materials in the building drum. After long-term use, the building drum is prone to deformation, which will cause the tire to expand less than the predetermined size, and thus make the sizes of the produced tires different. Therefore, how to solve this problem is what we need to consider. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a radially retractable tire building drum, which, through the coordination of structures such as a gear ring, a first gear and a rack, enables multiple limit plates to fit with the tire surface, limiting the tire expansion to a predetermined size, avoiding different tire sizes, and improving the tire building quality.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A radially retractable tire building drum comprises a rotating shaft, a slide groove is provided in the rotating shaft, an electric telescopic rod is installed on the inner wall of one side of the slide groove, the telescopic end of the electric telescopic rod is fixedly connected to a sliding column, the outer wall of the sliding column is fixedly connected to a plurality of first fixed plates, the other side of each of the first fixed plates extends to the outside, the outer wall of the rotating shaft is provided with a plurality of forming plates, one side wall of each of the forming plates is fixedly connected to a second fixed plate, the outer wall of each of the first fixed plates is rotatably connected to a plurality of connecting rods, the other end of each of the connecting rods is connected to the corresponding second fixed plate The outer wall of the rotating shaft is rotatably connected, the outer wall of the rotating shaft is fixedly connected to two side drums, the outer wall of the rotating shaft is provided with a limiting ring, a rotating groove is opened in the limiting ring, a gear ring is rotatably connected in the rotating groove, and a plurality of rotating rods are rotatably connected in the rotating groove, and the outer wall of each rotating rod is fixedly connected to the first gear, and each first gear is meshed with the gear ring. A plurality of moving grooves are opened on one side wall of the limiting ring, and a slider is slidably connected to the inner wall of each moving groove, and the other end of each slider is fixedly connected to a rack, and each rack is meshed with the corresponding first gear.

[0007] Preferably, both side walls of each forming plate are fixedly connected with a plurality of movable rods, and the outer wall of the rotating shaft is fixedly connected with two fixed plates.

[0008] Preferably, the two fixed plates are each provided with a plurality of through openings cooperating with corresponding moving rods, and the other end of each moving rod passes through the corresponding through opening.

[0009] Preferably, a motor is mounted on the outer wall of the limiting ring, the output shaft of the motor extends into the interior of the rotating groove and is fixedly connected to a second gear, and the second gear is meshed with the gear ring.

[0010] Preferably, one end of each rack is fixedly connected to a limit plate, and each limit plate is arc-shaped.

[0011] Preferably, a side wall of each of the limiting plates is provided with a protective layer, and each of the protective layers is made of rubber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. A gear ring, a first gear, and a rack are arranged to cooperate with each other, and multiple limit plates are moved to fit the tire surface, thereby limiting the tire expansion to a predetermined size, avoiding uneven tire sizes, and improving tire production quality. In addition, the moving distance of the multiple limit plates can be adjusted, so that tires of different sizes can be limited.

[0014] 2. An electric telescopic rod, a sliding column, and a connecting rod are provided. By moving the sliding column, the connecting rods rotate. With the cooperation of the fixed plate and the moving rod, the multiple forming plates are allowed to perform radial telescopic movement along the rotating shaft within the limits of the two fixed plates, thereby forming tires of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a radially retractable tire building drum proposed by the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the rotating shaft structure;

[0017] Figure 3 for Figure 2 Schematic cross-sectional view of ;

[0018] Figure 4 for Figure 3 A magnified view of point A;

[0019] Figure 5 for Figure 1 Schematic diagram of the limiting ring structure;

[0020] Figure 6 for Figure 5 Schematic diagram of the front side section;

[0021] Figure 7 for Figure 5 The right side cross-sectional diagram of ;

[0022] Figure 8 for Figure 7 Enlarged view of point B.

[0023] In the figure: 1 rotating shaft, 2 sliding groove, 3 electric telescopic rod, 4 sliding column, 5 first fixed plate, 6 forming plate, 7 second fixed plate, 8 connecting rod, 9 moving rod, 10 fixed plate, 11 through-hole, 12 side drum, 13 limiting ring, 14 rotating groove, 15 gear ring, 16 rotating rod, 17 first gear, 18 motor, 19 second gear, 20 moving groove, 21 slider, 22 rack, 23 limiting plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Reference Figures 1-8 The trolley assembly of claim 1 , wherein the trolley assembly is constructed of a plurality of substantially identical components and comprises a plurality of first and second fixing plates 5 , each of which is fixedly mounted on a shelf 12 , a second fixing plate 7 being fixedly mounted on the shelf 14 , a second fixing plate 7 being attached to the shelf 15 , a second fixing plate 7 being attached to the shelf 16 , a second fixing plate 7 being attached to the shelf 17 , a second fixing plate 7 being attached to the shelf 18 , a second fixing plate 7 being attached to the shelf 19 , a second fixing plate 7 being attached to the shelf 11 , a second fixing plate 7 being attached to the shelf 11 , a second fixing plate 7 being attached to the shelf 11 , a second fixing plate 7 being attached to the shelf 11

[0026] The outer wall of the rotating shaft 1 is fixedly connected with two fixed discs 10, a plurality of through openings 11 matched with corresponding moving rods 9 are formed in the two fixed discs 10, the other end of each moving rod 9 penetrates through the corresponding through opening 11 and is fixedly connected with a limiting block, each limiting block cannot pass through the corresponding through opening 11, and the plurality of forming plates 6 can do radial expansion and contraction movement along the rotating shaft 1 under the limitation of the two fixed discs 10; the outer wall of the rotating shaft 1 is fixedly connected with two side drums 12, the outer wall of the rotating shaft 1 is provided with a limiting ring 13, the limiting ring 13 is fixedly connected with a moving mechanism outside, the limiting ring 13 can be moved to the forming drum during forming, and the limiting ring 13 can be removed after forming to facilitate unloading; a rotating groove 14 is formed in the limiting ring 13, a gear ring 15 is rotatably connected in the rotating groove 14, a plurality of rotating rods 16 are rotatably connected in the rotating groove 14, the outer wall of each rotating rod 16 is fixedly connected with a first gear 17, and each first gear 17 is engaged with the gear ring 15;

[0027] The outer wall of the limiting ring 13 is provided with a motor 18, the motor 18 is a servo motor, the output shaft of the motor 18 extends into the rotating groove 14 and is fixedly connected with a second gear 19, the second gear 19 is engaged with the gear ring 15, a plurality of moving grooves 20 are formed in the side wall of the limiting ring 13, the inner wall of each moving groove 20 is slidably connected with a sliding block 21, the other end of each sliding block 21 is fixedly connected with a rack 22, each rack 22 is engaged with the corresponding first gear 17, one end of each rack 22 is fixedly connected with a limiting plate 23, the rotation of the second gear 19 drives the gear ring 15 engaged therewith to rotate, the rotation of the gear ring 15 drives the plurality of first gears 17 engaged therewith to rotate, and the rotation of the plurality of first gears 17 drives the plurality of ratchets 22 engaged therewith to move, so that the plurality of limiting plates 23 move until they are in close contact with the surface of the tire, limiting the tire from expanding to a predetermined size, thereby avoiding the tire size from being different and improving the service life of the forming drum, each limiting plate 23 is arc-shaped, a protective layer is arranged on the side wall of each limiting plate 23, and each protective layer is made of rubber.

[0028] In use, the electric telescopic rod 3 is started to drive the sliding column 4 to slide in the sliding groove 2, the sliding of the sliding column 4 drives the plurality of first fixed plates 5 to move, and the plurality of connecting rods 8 are driven to rotate, so that the plurality of forming plates 6 can be synchronously expanded outward or synchronously retracted inward under the cooperation of the moving rods 9 and the fixed discs 10, and the plurality of forming plates 6 can do radial expansion and contraction movement along the rotating shaft 1 under the limitation of the two fixed discs 10, so that the forming operation of tires of different sizes can be realized.

[0029] In addition, in order to prevent the tire from expanding to less than a predetermined size, the limit ring 13 can be moved to the outside of the multiple forming plates 6 through a moving mechanism, and then the motor 18 is started to rotate the second gear 19, thereby rotating the gear ring 15 that is engaged with the second gear 19. The rotation of the gear ring 15 will cause the multiple first gears 17 that are engaged with it to rotate, and the rotation of the multiple first gears 17 will cause the multiple racks 22 that are engaged with it to move, thereby causing the multiple limit plates 23 to move until they are in contact with the tire surface, limiting the tire expansion to a predetermined size, avoiding different tire sizes, and increasing the service life of the forming drum.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A radially retractable tire building drum, comprising a rotating shaft (1), characterized in that: A slide groove (2) is provided in the rotating shaft (1), an electric telescopic rod (3) is installed on the inner wall of one side of the slide groove (2), the telescopic end of the electric telescopic rod (3) is fixedly connected to a sliding column (4), the outer wall of the sliding column (4) is fixedly connected to a plurality of first fixed plates (5), the other side of each first fixed plate (5) extends to the outside, the outer wall of the rotating shaft (1) is provided with a plurality of forming plates (6), one side wall of each forming plate (6) is fixedly connected to a second fixed plate (7), the outer wall of each first fixed plate (5) is rotatably connected to a plurality of connecting rods (8), the other end of each connecting rod (8) is rotatably connected to the outer wall of the corresponding second fixed plate (7), and the outer wall of the rotating shaft (1) is fixedly connected to two side drums (12); A limiting ring (13) is provided on the outer wall of the rotating shaft (1), a rotating groove (14) is provided in the limiting ring (13), a gear ring (15) is rotatably connected in the rotating groove (14), a plurality of rotating rods (16) are rotatably connected in the rotating groove (14), the outer wall of each rotating rod (16) is fixedly connected to a first gear (17), each first gear (17) is meshed with the gear ring (15), a side wall of the limiting ring (13) is provided with a plurality of moving grooves (20), the inner wall of each moving groove (20) is slidably connected to a slider (21), the other end of each slider (21) is fixedly connected to a rack (22), and each rack (22) is meshed with the corresponding first gear (17).

2. A radially retractable tire building drum according to claim 1, characterized in that: Both side walls of each forming plate (6) are fixedly connected to a plurality of moving rods (9), and the outer wall of the rotating shaft (1) is fixedly connected to two fixed disks (10).

3. The radially retractable tire building drum according to claim 2, characterized in that: The two fixed plates (10) are each provided with a plurality of openings (11) that cooperate with the corresponding moving rods (9), and the other end of each moving rod (9) passes through the corresponding opening (11).

4. The radially retractable tire building drum according to claim 1, characterized in that: A motor (18) is mounted on the outer wall of the limiting ring (13). The output shaft of the motor (18) extends into the interior of the rotating groove (14) and is fixedly connected to a second gear (19). The second gear (19) is meshed with the gear ring (15).

5. The radially retractable tire building drum according to claim 1, characterized in that: One end of each rack (22) is fixedly connected to a limiting plate (23), and each limiting plate (23) is arc-shaped.

6. The radially retractable tire building drum according to claim 5, characterized in that: A side wall of each of the limiting plates (23) is provided with a protective layer, and each of the protective layers is made of rubber.

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