Tire building drum nut sleeve

Abstract

The utility model discloses a tire building drum nut sleeve which comprises a nut sleeve body, the nut sleeve body is provided with an installation groove used for being connected with a guide key in an inserted mode, a quick-change piece is arranged in the installation groove, and the quick-change piece is located between the guide key and the nut sleeve body so as to abut against the guide key and limit the guide key. The quick-change part is arranged to be matched with the mounting groove in the nut sleeve body to limit the guide key, when the internal pressure of the forming drum is transmitted to the nut sleeve through the side drum and the guide key, the quick-change part in the mounting groove is extruded to replace the nut sleeve body to deform, and the quick-change part can be replaced through a guide groove gap in the main shaft; the side drum and the internal ball screw are prevented from being disassembled during maintenance, the problem of large maintenance workload can be effectively solved, the maintenance time is shortened, the maintenance cost is reduced, and meanwhile uncontrollable risks such as damage to a nut of the ball screw, damage to an internal gas circuit of a main shaft, connection air leakage and air leakage in the side drum are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tire production, in particular to a nut sleeve for a tire building drum. Background Art

[0002] In the whole process of tire manufacturing production, the flat width of the tire directly determines the quality of the tire. The key equipment for controlling the flat width is the building drum of the building machine in the building process. The nut sleeve of the building drum is a key part for controlling the flat width in the production process of the formed tire embryo. Therefore, the equipment manufacturer has very strict assembly requirements for the position of the nut sleeve when manufacturing the building drum, and usually adopts a lapping process.

[0003] In the production process of the formed tire embryo, since the tire embryo needs to be shaped and inflated, it is inevitable that the internal pressure is transmitted to the nut sleeve through the side drum and the guide key. The notch of the nut sleeve is easily deformed and generates a gap under extrusion, resulting in the flat width of the tire embryo exceeding the technical requirements, causing quality problems or shutdowns.

[0004] The common maintenance method is to replace the nut sleeve. Due to the structure of the building drum, the nut sleeve is located inside the hollow main shaft. It is necessary to use a crane to remove the two inner and outer side drums of the main shaft, and then drag out the internal ball screw to disassemble the nut sleeve, resulting in a very large amount of disassembly and installation work during maintenance. Moreover, the maintenance process is prone to uncontrollable risks such as damage to the ball screw nut, damage to the air circuit inside the main shaft, air leakage at the connection, and air leakage inside the side drum. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, a nut sleeve for a tire building drum is proposed, which solves the problem of large disassembly and installation work during the maintenance of the nut sleeve in the above background art.

[0006] To achieve the above object, the following technical solutions are proposed by the present utility model:

[0007] A nut sleeve for a tire building drum, comprising a nut sleeve body. An installation groove for inserting a guide key is provided on the nut sleeve body. A quick-change part is arranged in the installation groove. The quick-change part is located between the guide key and the nut sleeve body to abut against the guide key and limit the guide key.

[0008] Further, there are two groups of the quick-change parts. The two groups of quick-change parts are arranged oppositely along the extending direction of the nut sleeve body, and the guide key is clamped between the two groups of quick-change parts.

[0009] Further, the quick-change part includes a first quick-change plate, and the first quick-change plate is clamped between the guide key and the inner wall of the installation groove. The height of the first quick-change plate is equal to the depth of the installation groove.

[0010] Further, the quick-change part further includes a second quick-change plate, and the second quick-change plate is arranged perpendicular to the first quick-change plate and fixedly connected to one end of the first quick-change plate.

[0011] Further, the second quick-change plate is located on the side of the first quick-change plate away from the guiding key, and the second quick-change plate is snap-fitted into a limiting groove formed in the nut sleeve body.

[0012] Further, the limiting groove communicates with the installation groove, and when the second quick-change plate is snap-fitted into the limiting groove, the surface thereof is flush with the surfaces of the nut sleeve body and the first quick-change plate.

[0013] Further, the second quick-change plate and the first quick-change plate are integrally formed, the second quick-change plate is detachably connected to the nut sleeve body, and a locking threaded hole is formed at the bottom of the limiting groove.

[0014] Further, a counterbore is formed in the second quick-change plate, a connection hole penetrating through the second quick-change plate is formed in the counterbore, and a locking bolt is detachably connected in the counterbore.

[0015] Further, the nut sleeve body is located inside the hollow main shaft of the forming drum, the nut sleeve body is sleeved around the periphery of the lead screw nut, and the lead screw nut is threadedly connected to the lead screw.

[0016] Compared with the prior art, the comprehensive effects brought by the present utility model include:

[0017] By providing a quick-change member to cooperate with the installation groove on the nut sleeve body to limit the guiding key, when the internal pressure of the forming drum is transmitted to the nut sleeve through the side drum and the guiding key, the quick-change member in the installation groove is squeezed to deform instead of the nut sleeve body. The quick-change member can be replaced through the guiding groove gap on the main shaft, avoiding the disassembly of the side drum and the internal ball screw during maintenance, effectively solving the problem of large maintenance workload, shortening the maintenance time, reducing the maintenance cost, and at the same time avoiding uncontrollable risks such as damage to the lead screw nut of the ball screw, damage to the air circuit inside the main shaft, air leakage in the connection, and air leakage inside the side drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the installation structure of the embodiment of the present utility model and the forming drum;

[0019] Figure 2 is Figure 1 a partial structural diagram in

[0020] Figure 3 is a schematic overall structural diagram of the nut sleeve of the embodiment of the present utility model;

[0021] Figure 4 is a schematic top view structural diagram of the nut sleeve of the embodiment of the present utility model.

[0022] Legend: 1. Nut sleeve body; 2. Guide key; 3. Installation groove; 4. First quick-change plate; 5. Second quick-change plate; 6. Limit groove; 7. Spindle; 8. Lead screw nut; 9. Lead screw; 10. Blank; 11. Side drum; 12. Guide groove gap. Detailed implementation

[0023] The following will combine the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present invention.

[0024] In this article, terms such as "upper", "lower", "left", "right", "top", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] In the production process of the forming blank 10, since the blank 10 needs to be shaped and inflated, it is inevitable that the internal pressure is transmitted to the nut sleeve through the side drum 11 and the guide key 2. The notch of the nut sleeve is squeezed and deformed, resulting in a gap, which causes the flat width of the blank 10 to exceed the technical requirements, resulting in quality problems or shutdown; to solve the above problems, the following solutions are proposed in this application.

[0026] As Figures 1 to 3 shown, a tire forming drum nut sleeve includes a nut sleeve body 1. An installation groove 3 for inserting a guide key 2 is provided on the nut sleeve body 1. A quick-change part is arranged in the installation groove 3. The quick-change part is located between the guide key 2 and the nut sleeve body 1 to abut against the guide key 2 and limit the guide key 2.

[0027] By setting a quick-change part to cooperate with the installation groove 3 on the nut sleeve body 1 to limit the guide key 2, when the internal pressure of the forming drum is transmitted to the nut sleeve through the side drum and the guide key 2, the quick-change part in the installation groove 3 is squeezed and deformed instead of the nut sleeve body 1. Just replace the quick-change part through the guide groove gap 12 on the spindle, which can avoid disassembling the side drum and the internal ball screw 9 during maintenance, effectively solve the problem of large maintenance workload, shorten the maintenance time, reduce the maintenance cost, and at the same time avoid uncontrollable risks such as damage to the lead screw nut, damage to the internal air circuit of the spindle, air leakage in the connection, and air leakage inside the side drum.

[0028] In the tire forming drum nut sleeve of this embodiment, there are two groups of quick-change parts, and the two groups of quick-change parts are arranged opposite to each other along the extension direction of the nut sleeve body 1. The guide key 2 is clamped between the two groups of quick-change parts.

[0029] Specifically, the nut sleeve is divided into a left nut sleeve and a right nut sleeve, with two sets respectively arranged and installed on both sides of the forming drum. The nut sleeve body 1 is located inside the hollow main shaft 7 of the forming drum. The nut sleeve body 1 is sleeved around the lead screw nut 8, and the lead screw nut 8 is threadedly connected to the lead screw 9.

[0030] By providing two sets of quick-change parts to respectively limit and fix both sides of the guiding key 2, the limiting effect is ensured, the pressure in different directions is supported, the protection effect on the notch of the installation groove 3 is ensured, and the actual use requirements are met.

[0031] In the nut sleeve of the tire forming drum of this embodiment, the quick-change part includes a first quick-change plate 4. The first quick-change plate 4 is clamped between the guiding key 2 and the inner wall of the installation groove 3, and the height of the first quick-change plate 4 is equal to the depth of the installation groove 3.

[0032] Through the above settings, the guiding key 2 is separated from the side wall of the installation groove 3, preventing the guiding key from being pressed against the notch of the installation groove 3 and causing extrusion deformation, thereby protecting the nut sleeve body 1. The first quick-change plate 4 is set to be equal in height to the installation groove 3, that is, flush with the surface of the nut sleeve body 1, to avoid friction between the first quick-change plate 4 and the inner wall of the main shaft 7 and resulting in damage.

[0033] In the nut sleeve of the tire forming drum of this embodiment, the quick-change part further includes a second quick-change plate 5. The second quick-change plate 5 is perpendicularly arranged to the first quick-change plate 4 and fixedly connected to one end of the first quick-change plate 4.

[0034] Specifically, the second quick-change plate 5 is set to be connected to the top end of the first quick-change plate 4, facilitating the replacement of the quick-change part by driving the first quick-change plate 4 inserted in the installation groove 3 to be removed by disassembling the second quick-change plate 5. At the same time, the second quick-change plate 5 increases the thickness of the first quick-change plate 4, improving the strength of the quick-change part.

[0035] In the nut sleeve of the tire forming drum of this embodiment, the second quick-change plate 5 is located on the side of the first quick-change plate 4 away from the guiding key 2, and the second quick-change plate 5 is clamped in the limiting groove 6 opened on the nut sleeve body 1.

[0036] Specifically, two second quick-change plates 5 are respectively located on the mutually remote sides of the first quick-change plate 4. The limiting groove 6 limits the second quick-change plate 5 to provide support. The second quick-change plate 5 is horizontally arranged to cooperate with the first quick-change plate 4, strengthening the protection of the top of the installation groove 3, that is, the most easily deformed notch part, enhancing the compressive capacity of the quick-change part, and improving the practicability.

[0037] In the nut sleeve of the tire forming drum of this embodiment, the limiting groove 6 communicates with the installation groove 3. When the second quick-change plate 5 is clamped in the limiting groove 6, its surface is flush with the surfaces of the nut sleeve body 1 and the first quick-change plate 4.

[0038] Specifically, the quick-change part is L-shaped, and the installation groove 3 and the two-sided limit grooves 6 as a whole are T-shaped. The L-shaped quick-change part is fitted on both sides of the T-shape to form a groove for clamping the guiding key 2 in the middle. The above settings make the structure of the nut sleeve body 1 compact and have high connection strength, effectively protecting the installation groove 3. Setting the second quick-change plate 5 flush with the surface of the nut sleeve body 1 also prevents friction with the inner wall of the main shaft 7.

[0039] Specifically, the material of the L-shaped quick-change part is 40Cr, quenched and tempered to HB255-285. The height of the quick-change part is flush with the main body, and the width is the same as the width of the notch.

[0040] In the tire building drum nut sleeve of this embodiment, the second quick-change plate 5 and the first quick-change plate 4 are integrally formed, the second quick-change plate 5 is detachably connected to the nut sleeve body 1, and a locking threaded hole is provided at the bottom of the limit groove 6.

[0041] Specifically, a counterbore is provided on the second quick-change plate 5, a connection hole penetrating the second quick-change plate 5 is provided in the counterbore, and a locking bolt is detachably connected in the counterbore. Through the above structure, the locking bolt is inserted into the counterbore and the connection hole, and the locking bolt is rotated to cooperate with the locking threaded hole on the nut sleeve body 1 to realize the installation and fixation of the quick-change part. The counterbore is provided to ensure that the top end of the locking bolt is not higher than the surface of the nut sleeve body 1, avoiding friction with the inner wall of the main shaft 7.

[0042] Preferably, two locking nuts are provided on each second quick-change plate 5 to improve the connection strength of the quick-change part. The connection uses M6 hexagon socket head cap screws, the height of the bolts is flush with the main body, and the tolerance of the notch size after assembling the quick-change part is controlled at 60 + 0.05mm.

[0043] Install the new type of nut sleeve on the nut of the forming drum ball screw, assemble it inside the forming drum main shaft 7, drive the left and right drums to move through the guiding key 2. During use, due to the force, the notch becomes larger and a gap is generated. During maintenance, remove the locking bolt, replace the extruded and deformed quick-change part, and install the guiding key 2 to verify the gap.

[0044] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "rotation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] Although the embodiments of the present utility model have been shown and described in detail, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tire building drum nut sleeve, characterized in that, It includes a nut sleeve body, and an installation groove for inserting a guide key is formed in the nut sleeve body. A quick-change part is arranged in the installation groove, and the quick-change part is located between the guide key and the nut sleeve body to abut against the guide key and limit the guide key.

2. The tire building drum nut sleeve according to claim 1, characterized in that There are two groups of the quick-change parts, and the two groups of quick-change parts are arranged oppositely along the extending direction of the nut sleeve body. The guide key is clamped between the two groups of quick-change parts.

3. The tire building drum nut sleeve according to claim 1, wherein The quick-change part includes a first quick-change plate, and the first quick-change plate is clamped between the guide key and the inner wall of the installation groove. The height of the first quick-change plate is equal to the depth of the installation groove.

4. The tire building drum nut sleeve according to claim 3, characterized in that, The quick-change part further includes a second quick-change plate, and the second quick-change plate is arranged perpendicular to the first quick-change plate and fixedly connected to one end of the first quick-change plate.

5. The tire building drum nut sleeve according to claim 4, wherein, The second quick-change plate is located on the side of the first quick-change plate away from the guide key, and the second quick-change plate is clamped in a limiting groove formed in the nut sleeve body.

6. The tire building drum nut sleeve according to claim 5, wherein The limiting groove communicates with the installation groove. When the second quick-change plate is clamped in the limiting groove, its surface is flush with the surfaces of the nut sleeve body and the first quick-change plate.

7. The tire building drum nut sleeve according to claim 5, characterized in that, The second quick-change plate and the first quick-change plate are integrally formed. The second quick-change plate is detachably connected to the nut sleeve body, and a locking threaded hole is formed at the bottom of the limiting groove.

8. The tire building drum nut sleeve according to claim 7, wherein, A counterbore is formed in the second quick-change plate, a connecting hole penetrating through the second quick-change plate is formed in the counterbore, and a locking bolt is detachably connected in the counterbore.

9. The tire building drum nut sleeve according to claim 1, wherein The nut sleeve body is located in the hollow main shaft of the forming drum. The nut sleeve body is sleeved around the screw nut of the lead screw, and the screw nut is threadedly connected to the lead screw.

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