Radial telescopic tire building drum head
Through the design of radial telescopic heads, the cylinder and piston rods drive the tiles to move radially along the main shaft, solving the problems of production difficulties and molding interference of small and medium-sized heads in the prior art, achieving efficient and reliable tire forming, improving the Formation quality and efficiency.
Patent Information
- Application Number
- CN202322744083.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-10-12
AI Technical Summary
The existing tire forming drum head design requires space to be reserved in the horizontal direction to achieve the expansion and shrinking action, which limits the production of small-sized heads, and cannot produce heads with a head width of less than 200mm, resulting in interference between the fixture and the movement during the forming process. , affects efficiency and quality.
The radial telescopic head design is adopted, and the large tiles and small tiles are driven to move along the spindle radially through the spindle assembly and the radial telescopic device. The cylinder and piston rod are used to achieve the expansion and shrinking of the forming drum, which eliminates the traditional machine head Horizontal stroke, forming an annular structure, adapting to different tire specifications.
The reliable expansion and contraction of the machine head is achieved, which significantly reduces the movement width, avoids interference between the fixture and the movement, improves the molding efficiency and product quality, and does not need to increase or extend the molding steps, saving modification costs.
Smart Images
Figure CN222136024U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of a molding machine head for producing tires, in particular to a radially telescopic tire molding drum machine head. Background Art
[0002] The tire building drum is a forming machine that is barrel-shaped and expandable. It is mainly used to support the inside of the tire during the tire forming process, so that the carcass cord, belt layer and tread are attached to the building drum, and finally the finished tire embryo is obtained. The building drum is a key component in the tire building equipment, and its structure varies with the different tire building processes.
[0003] At present, the design of tire building drum is divided into two types: rotary type and expansion type. Among them, the rotary tire building drum is usually equipped with a cylinder, the cylinder rod is concentric with the main shaft sleeve and moves synchronously, and the tail flange of the machine head is fixed to the main shaft sleeve by screws. When the motor drives the sleeve to operate through the belt, the drum shell of the building drum realizes the expansion and contraction of the machine head driven by the connecting rod. The structure of the other type of expansion and contraction semi-steel secondary method machine head is divided into two types: connecting rod type and guide rail type. Both of these machine heads use T-pins to connect the pull rod and the slide seat or wedge body to move synchronously to achieve radial expansion and contraction of the machine head.
[0004] However, both of the above die designs require a certain amount of space to be reserved in the horizontal direction to facilitate the transmission mechanism to achieve the expansion and contraction of the die. As a result, the tire building drum die cannot be designed to produce small-sized (die width ≤ 200mm), which restricts the development of some small-sized die. Utility Model Content
[0005] In view of the above problems, the utility model proposes a radially telescopic tire building drum head, which is characterized by comprising:
[0006] A main shaft assembly, a radial expansion device and a drum-tile assembly. A radial expansion device is fixed around the outside of the main shaft assembly, which can drive the radial expansion device to rotate along the axial direction of the main shaft assembly to form an annular structure for positioning the tire. The radial expansion device includes a plurality of expansion mechanisms that can expand and contract radially along the main shaft assembly. The drum-tile assembly includes a plurality of large tiles and small tiles, which are sequentially connected to the outside of the radial expansion device. As the radial expansion device moves along the radial direction of the main shaft assembly, the expansion and contraction of the forming drum is completed.
[0007] In some specific embodiments, there are 8 radial expansion devices, which are arranged around the circumference of the main shaft assembly; there are 4 large tiles and 4 small tiles, which are detachably connected to the outside of the expansion mechanism in sequence. The detachable tiles can be replaced with tiles of suitable size at any time according to the specifications of the tires produced, thereby improving the applicability of the product.
[0008] In some specific embodiments, the telescopic mechanism includes a transmission part, a telescopic part and a limiting part.
[0009] In some specific embodiments, the transmission part includes a cylinder, a cylinder base, a central air chamber and a silencer tee; the central air chamber is arranged inside the main shaft assembly; the silencer tee is fixed at the tail of the central air chamber for exhausting gas; a cylinder base is arranged at the bottom of the cylinder; the cylinder base is fixed to the outside of the main shaft assembly and is provided with an air hole so that the gas in the central air chamber can be discharged into the cylinder.
[0010] In some specific embodiments, the telescopic portion includes a piston rod; the piston rod is disposed inside the cylinder and is pushed out from the top of the cylinder as the gas in the cylinder enters.
[0011] In some specific embodiments, the limiting portion includes a spring assembly for retracting the extruded piston rod.
[0012] In some specific embodiments, the main shaft of the machine head is sealed, and only air holes are opened at the base of each cylinder. Compressed gas can enter the cylinder through the cylinder base, pushing the piston rod of the cylinder to extend to complete the expansion action.
[0013] In some of the specific embodiments, a plurality of large pads and small pads are detachably connected to the radial expansion and contraction device via a transmission rod, and are driven by a piston rod to move in the radial direction of the main shaft assembly.
[0014] In some specific embodiments, when the system receives an expansion command, the cylinder is filled with gas, squeezing the piston rod to push it out, driving the large and small pads to be pushed out along the radial direction of the main shaft assembly. The large and small pads come into contact with each other to form a circular shape, completing the expansion action.
[0015] In some specific embodiments, when the system receives a drum retraction command, the gas in the main shaft assembly is discharged through the silencer tee at the tail of the central air chamber. At this time, under the tension of the spring assembly, the piston rod and the drum shoe assembly are driven to retract, completing the drum retraction action.
[0016] The beneficial effects of the utility model are:
[0017] The utility model discloses a radial telescopic tire building drum machine head, which adopts a radial telescopic mechanism to control the tiles to complete the expansion and contraction process of the building drum. The expansion and contraction of the machine head is completed by the expansion and contraction of the piston, and the expansion and contraction action is completed only by the radial action of the cylinder, which saves the horizontal distance of the traditional machine head, so the width of the core can be greatly reduced.
[0018] The head of the utility model can expand and contract reliably, and the width of the core can be greatly narrowed. Even if the head width is less than 200mm, the specification of the tile and the core can still maintain a large difference, and no modification of the capsule, fixture or equipment is required, which saves the cost of transformation and improves the molding quality and efficiency. The head does not need to add or extend any molding steps, overcomes the problem of interference between the fixture and the core in the narrow head molding, and improves the molding efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the present application. The schematic examples and descriptions of the utility model are used to explain the utility model and do not constitute improper limitations on the utility model.
[0020] Figure 1 The schematic diagram of the structure of the new machine head in the utility model is shown;
[0021] Figure 2 The utility model shows a schematic structural diagram of the new die head during the expansion process.
[0022] In the figure: 1. Large bearing spring hole; 2. Piston rod; 3. Cylinder; 4. Cylinder base; 5. Silencer tee; 6. Small bearing spring hole; 7. Large bearing; 8. Small bearing; 9. Ring spring; 10. Movement cover; 11. Center air chamber. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0024] Examples of embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0025] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axis", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or 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.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "join", "hinge" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] The working principle of the connecting rod type machine head and the guide rail type machine head is similar. They both use the horizontal displacement of the slide / wedge to achieve the radial expansion and contraction of the machine head block, thereby completing the process requirements such as loading and unloading tires. Limited by the width and movement stroke of the slide / wedge, the narrowest width of the movement can only be 170mm at present.
[0029] When the width of the molding machine head is less than 200mm, due to the small difference between the movement and the tile, interference between the movement and the capsule clamp screws or the inner wall of the capsule slide seat may occur during molding.
[0030] The utility model is directed to a radially telescopic tire building drum head, which is characterized by comprising:
[0031] A main shaft assembly, a radial expansion device and a drum-tile assembly. A radial expansion device is fixed around the outside of the main shaft assembly, which can drive the radial expansion device to rotate along the axial direction of the main shaft assembly to form an annular structure for positioning the tire. The radial expansion device includes a plurality of expansion mechanisms that can expand and contract radially along the main shaft assembly. The drum-tile assembly includes a plurality of large tiles and small tiles, which are sequentially connected to the outside of the radial expansion device. As the radial expansion device moves along the radial direction of the main shaft assembly, the expansion and contraction of the forming drum is completed.
[0032] In this embodiment, there are 8 radial expansion devices, which are fixed along the circumference of the main shaft assembly; there are 4 large and small tiles, which are detachably connected to the outside of the expansion mechanism in turn. They are connected to the transmission rod and driven by the piston rod to move in the radial direction of the main shaft assembly. The detachable tiles can be replaced with tiles of suitable size at any time according to the specifications of the tires produced, thereby improving the applicability of the product.
[0033] In this embodiment, the telescopic mechanism includes a transmission part, a telescopic part and a limiting part.
[0034] In this embodiment, the transmission part includes a cylinder, a cylinder base, a central air chamber and a silencer tee; the central air chamber is arranged inside the main shaft assembly; the silencer tee is fixed at the tail of the central air chamber for discharging gas; a cylinder base is arranged at the bottom of the cylinder; the cylinder base is fixed to the outside of the main shaft assembly and is provided with an air hole so that the gas in the central air chamber can be discharged into the cylinder.
[0035] In this embodiment, the telescopic part includes a piston rod; the piston rod is arranged inside the cylinder and is pushed out from the top of the cylinder as the gas in the cylinder enters.
[0036] In this embodiment, the limiting part is an annular spring, which is used to retract the extruded piston rod and drive the large and small bearings to recover to complete the drum shrinking action.
[0037] In this embodiment, the main shaft of the machine head is sealed, and only air holes are opened at the base of each cylinder. The compressed gas in the central air chamber can only enter the cylinder through the cylinder base, pushing the piston rod of the cylinder to extend to complete the expansion action.
[0038] The following is a detailed description with reference to the accompanying drawings:
[0039] like Figure 1 and Figure 2 As shown, it is a schematic diagram of the structure of the new machine head in the utility model, wherein 1 is a large bearing spring hole, 2 is a piston rod, 3 is a cylinder, 4 is a cylinder base, 5 is a silencer tee, 6 is a small bearing spring hole, 7 is a large bearing, 8 is a small bearing, 9 is an annular spring, 10 is a movement pressure cover, and 11 is a central air chamber.
[0040] Among them, 8 telescopic mechanisms are arranged radially around the main shaft; there are 4 large bearings 7 and 4 small bearings 8, which are sequentially sleeved on the outside of the telescopic mechanism. The telescopic mechanism consists of a piston rod 2, a cylinder 3, a cylinder base 4, a central air chamber 11 and a muffler tee 5. The central air chamber 11 is placed inside the main shaft, the muffler tee 5 is placed on the right side of the main shaft, and the cylinder base 4 is placed on the main shaft to connect the cylinder 3 and the piston rod 2.
[0041] When receiving the inflation command, the central air chamber 11 is filled with gas, which enters the cylinder 3 through the air hole of the cylinder base 4. The air is squeezed and pushes the piston rod 2 to extend outward to complete the inflation action.
[0042] Among them, an annular spring 9 is arranged along the outer side of the movement pressure cover 10 as an elastic fixing, and a spring hole is arranged on the connecting rod between the large bearing 7 and the small bearing 8 and the main shaft, and the annular spring 9 is arranged through the spring hole.
[0043] When the system receives the drum contraction command, the reversing valve on the right side of the equipment is activated, and the gas in the main shaft of the machine head is discharged through the silencer tee 5 on the right side of the equipment. At this time, under the pulling force of the annular spring 9, the machine head realizes the drum contraction action.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A radially telescopic tire building drum head, characterized in that: include: Spindle assembly, radial expansion device and drum shoe assembly; The radial expansion and contraction device is fixed around the outer side of the main shaft assembly, and can drive the radial expansion and contraction device to rotate along the axial direction of the main shaft assembly to form an annular structure for positioning the tire; The radial telescopic device includes a plurality of telescopic mechanisms that can be telescoped radially along the main shaft assembly; The drum shoe assembly includes a plurality of large shoe blocks and small shoe blocks, which are sequentially connected to the outside of the radial expansion and contraction device. As the radial expansion and contraction device moves along the radial direction of the spindle assembly, the expansion and contraction of the forming drum is completed. There are 8 radial telescopic devices, which are arranged around the circumference of the main shaft assembly; there are 4 large tiles and 4 small tiles, which are detachably connected to the outside of the telescopic mechanism in turn; The telescopic mechanism comprises a transmission part, a telescopic part and a limiting part; The transmission part includes a cylinder, a cylinder base, a central air chamber and a silencer tee; the central air chamber is arranged inside the main shaft assembly; the silencer tee is fixed at the tail of the central air chamber for exhausting gas; the cylinder base is arranged at the bottom of the cylinder; the cylinder base is fixed to the outside of the main shaft assembly and is provided with air holes so that the gas in the central air chamber can be discharged into the cylinder.
2. The radially telescopic tire building drum head according to claim 1, wherein: The telescopic part comprises a piston rod; the piston rod is arranged inside the cylinder and is pushed out from the top of the cylinder as the gas in the cylinder enters.
3. The radially telescopic tire building drum head according to claim 2, wherein: The limiting portion includes a spring assembly for retracting the extruded piston rod.
4. The radially telescopic tire building drum head according to claim 1, wherein: The main shaft of the machine head is sealed, and only air holes are opened at the base of each cylinder. Compressed gas can enter the cylinder through the cylinder base, pushing the piston rod of the cylinder to extend to complete the expansion action.
5. The radially telescopic tire building drum head according to claim 2, wherein: The plurality of large tiles and small tiles are detachably connected to the radial expansion and contraction device via a transmission rod, and are driven by the piston rod to move in the radial direction of the main shaft assembly.