A pull-resistant lotus head device

Abstract

The utility model discloses a kind of lotus head devices of resistance to pull, it includes bottle embryo fixer, connecting seat, flange quick-change shaft sleeve, rotating sleeve assembly and sprocket shaft system. By optimizing the structural design of flange quick-change shaft sleeve and sprocket shaft system, adopt roller to reduce friction, reduce abrasion by elastic baffle ring and limit baffle pin, avoid interference by arc concave, realize quick assembly by buckle groove. The utility model can significantly improve the resistance to pull performance of device, prolong service life, improve operation stability and simplify maintenance operation, applicable to high frequency rotation and telescopic small equipment, meet actual production demand.

Description

Technical Field

[0001] This utility model relates to the technical field of blow molding equipment, and in particular to a tensile-resistant lotus head device. Background Technology

[0002] Currently, most blow molding production equipment relies on manual insertion and removal of preforms, while some automated blow molding equipment uses translational molds. This results in low production efficiency and a tendency to contaminate the bottles produced. In the field of machining and manufacturing, lotus head assembly is frequently used. A high-quality, easy-to-install lotus head assembly can significantly improve production efficiency. However, we have found that during use, the sprocket shaft undergoes a lifting and lowering process. Since multiple lotus head assemblies are typically used to form a conveyor chain for bottle blow molding, smaller machines use fewer lotus head assemblies. Therefore, the extension, retraction, and rotation of each lotus head are more frequent, leading to more intense friction between the sprocket shaft and the conversion sleeve assembly. This reduces the lifespan of the lotus head, requiring customers to frequently inspect and replace individual lotus heads. Therefore, a lotus head assembly that can balance radial loads and reduce friction is needed to minimize deformation during pulling. Utility Model Content

[0003] The purpose of this invention is to provide a tensile-resistant lotus head device to overcome the shortcomings of the existing technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A tensile-resistant lotus head device includes a pair of preform holders, a connecting seat, a flange-type quick-change bushing, a rotating sleeve assembly, and a sprocket shaft system, wherein: The connecting seat has a threaded hole in the middle for installing a bearing; a pair of collars extend symmetrically from the two side walls of the connecting seat, and are sleeved with the preform holder through the collars. The preform holder includes a flange-type quick-change bushing, which passes through the connecting seat and is sleeved with the rotating sleeve assembly. The flange-type quick-change bushing bears the traction force of the rotating sleeve assembly and transmits the traction force to the connecting seat, thereby driving the entire device to move.

[0005] Furthermore, the flange-type quick-change bushing adopts a straight roller bushing with roller grooves on its inner wall. Multiple rollers slide within the roller grooves, and the rollers abut against the outer walls of the upper and lower sprocket shafts. When the rotating sleeve assembly applies a pulling force, the roller design prevents the sprocket shaft from undergoing radial deformation during the pulling process, while ensuring that the sprocket shaft can easily slide up and down axially. A pair of annular grooves are provided at one end of the flange-type quick-change bushing, and elastic retaining rings are installed within these grooves. The elastic retaining rings are snapped onto the flange-type quick-change bushing and are arranged on the top and bottom sidewalls of the aluminum sleeve to limit the position of the aluminum sleeve on the flange-type quick-change bushing and prevent axial displacement of the aluminum sleeve.

[0006] Specifically, the sprocket shaft system includes an upper sprocket shaft and a lower sprocket shaft, each passing through and slidably connected to its corresponding flange-type quick-change bushing. The upper sprocket shaft has a first sprocket integrally formed at its top end, with a first disc positioned below it; the lower sprocket shaft has a second disc integrally formed at its top end, with a second sprocket positioned below it. The upper and lower sprocket shafts rotate synchronously during operation through sprocket engagement. A snap-fit ​​groove, curved in an L-shape, is provided at the bottom of the sprocket shaft, extending upwards from the bottom to facilitate quick assembly of the lotus head and prevent axial disengagement of the sprocket shaft.

[0007] Furthermore, the side walls of the connecting seat are recessed inward to form arc-shaped concave surfaces, which match the arc-shaped extensions at both ends of the rotating sleeve assembly to prevent interference or collision during the swinging of the rotating sleeve assembly. One end of the flange-type quick-change bushing is integrally formed with a mounting head, which extends outward to form a mounting platform. The mounting platform has threaded holes for bolt connection with the unloading sleeve. The mounting head also integrally forms a limiting flange located below the mounting platform. A limiting stop pin extends outward from one side wall of the connecting seat, abutting against the limiting flange to restrict the axial rotation of the flange-type quick-change bushing.

[0008] Furthermore, through the aforementioned structural design, the device achieves a sliding fit between the sprocket shaft and the flange-type quick-change bushing. The rollers significantly reduce friction during this sliding fit, preventing radial deformation of the sprocket shaft during tensioning. The design of the elastic retaining ring and limiting pin reduces wear between components, extending the device's service life. The snap-fit ​​groove design at the bottom of the sprocket shaft allows for quick assembly and disassembly of the lotus head, improving maintenance efficiency.

[0009] In particular, the matching design between the arc-shaped concave surface and the arc-shaped extensions at both ends of the rotating sleeve assembly ensures that the rotating sleeve assembly will not interfere or collide during swinging, thereby improving the stability of the device operation. The cooperation between the limiting protrusion and the limiting stop pin restricts the axial rotation of the flange-type quick-change bushing, further enhancing the overall reliability of the device.

[0010] Furthermore, the device achieves radial load balance through optimized design of the flange-type quick-change bushing and sprocket shaft system. During the sliding process of the sprocket shaft, the roller design reduces the contact area between the sprocket shaft and the flange-type quick-change bushing, thereby reducing friction. The elastic retaining ring not only limits the position of the aluminum sleeve but also absorbs some stress through elastic deformation, preventing component damage caused by stress concentration.

[0011] Furthermore, the snap-fit ​​groove design in the device, through its curved L-shaped form, provides axial limiting functionality while facilitating assembly and disassembly by operators using simple tools. This design not only simplifies the assembly process but also improves the maintainability of the device.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model solves the problems of short service life, easy deformation, high friction, and inconvenient assembly in existing lotus head devices through the above-mentioned technical solutions. The device, through the cooperative design of the roller and sprocket shaft, significantly reduces friction and prevents radial deformation of the sprocket shaft during traction, thereby improving the tensile strength of the device. The design of the elastic retaining ring and the limiting pin effectively reduces wear between components and extends the service life of the device. The snap-fit ​​groove design at the bottom of the sprocket shaft enables quick assembly and disassembly of the lotus head, improving production efficiency. The design of the arc-shaped concave surface and the limiting protrusion avoids interference and collision between components, ensuring the stability of the device's operation.

[0013] In particular, the device is suitable for high-frequency rotation and extension operations in small equipment, which can significantly improve production efficiency and reduce maintenance costs. Through the specific implementation of the above-mentioned innovations, this utility model provides a compact and high-performance tensile-resistant lotus head device that meets the needs of actual production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side sectional view of the present invention; Figure 3 This is a top view of the cross-section of this utility model.

[0015] Attached image annotations: 1. Aluminum sleeve; 2. Flange-type quick-change bushing; 3. Connecting seat; 4. Rotating sleeve assembly; 5. First sprocket; 6. Second sprocket; 7. Elastic retaining ring; 8. Limiting pin; 9. Limiting flange; 10. Upper sprocket shaft; 11. Lower sprocket shaft; 12. Mounting platform; 13. Roller; 14. Snap-fit ​​groove. Detailed Implementation

[0016] like Figure 1-3As shown, this embodiment provides a lotus head device, including a pair of preform holders, with a connecting seat 3 sleeved between the preform holders. The two side walls of the connecting seat 3 are respectively provided with a pair of collars extending outward symmetrically. The connecting seat 3 is sleeved with the preform holders through the collars. The preform holders include flange-type quick-change bushings 2. The flange-type quick-change bushings 2 are fitted with rotating sleeve assemblies 4 and pass through the connecting seat 3. The flange-type quick-change bushings 2 can withstand the traction force of the rotating sleeve assembly 4 and simultaneously apply traction force to the connecting seat 3, thereby driving the entire lotus head device to move. A threaded hole is opened on the surface of the middle part of the connecting seat 3 to facilitate the installation of a pair of bearings.

[0017] In this embodiment, the preform holder also includes an aluminum sleeve 1, which is fitted onto a flange-type quick-change bushing 2. The flange-type quick-change bushing 2 has a pair of annular grooves at one end after passing through the connecting seat 3. An elastic retaining ring 7 is provided in the annular groove. The elastic retaining ring 7 is snapped onto the flange-type quick-change bushing 2 through the annular groove. The elastic retaining ring 7 is arranged on the top and bottom side walls of the aluminum sleeve 1 to limit the position of the aluminum sleeve 1 on the flange-type quick-change bushing 2.

[0018] The preform holder is another important component of the device, including a flange-type quick-change bushing 2, an aluminum sleeve 1, and related fixing structures. The flange-type quick-change bushing 2 passes through the connecting seat 3 and is sleeved on the rotating sleeve assembly 4. The flange-type quick-change bushing 2 adopts a straight roller bushing design, with roller grooves on its inner wall, in which multiple rollers 13 slide. These rollers 13 abut against the outer walls of the upper sprocket shaft 10 and the lower sprocket shaft 11. When the rotating sleeve assembly 4 applies a pulling force, the design of the rollers 13 significantly reduces the friction between the sprocket shaft and the flange-type quick-change bushing 2, while preventing radial deformation of the sprocket shaft during the pulling process. One end of the flange-type quick-change bushing 2 has a pair of annular grooves, in which elastic retaining rings 7 are installed. The elastic retaining rings 7 are snapped onto the flange-type quick-change bushing 2 through the annular grooves and are arranged on the top and bottom side walls of the aluminum sleeve 1 to limit the position of the aluminum sleeve 1 on the flange-type quick-change bushing 2. This design not only reduces wear between components, but also absorbs some stress through elastic deformation, thus avoiding component damage caused by stress concentration.

[0019] To ensure the reliability of rotation, a snap-fit ​​groove 14 is provided at the bottom of the sprocket shaft. The snap-fit ​​groove 14 is arranged in a curved L-shape around the sprocket shaft, specifically extending upward from the bottom of the sprocket shaft. This allows for quick installation of the lotus head while ensuring that the snap-fit ​​is not prone to axial disengagement.

[0020] In this embodiment, a pair of preform holders includes an upper sprocket shaft 10 and a lower sprocket shaft 11 arranged adjacent to each other. Both the upper and lower sprocket shafts are components of one of the preform holders. The difference between the upper and lower sprocket shafts 10 and 11 is the location of their sprockets. When either one is displaced, their respective sprockets will become collinear and mesh. That is, in operation, the rotation of one preform holder will simultaneously cause the other to rotate. The upper sprocket shaft 10 has a first sprocket 5 integrally formed at its top end, and a first disc is disposed below the first sprocket 5. The lower sprocket shaft 11 has a second disc integrally formed at its top end, and a second sprocket 6 is disposed below the second disc.

[0021] In this embodiment, the upper sprocket shaft 10 and the lower sprocket shaft 11 each pass through their respective flange-type quick-change bushings 2 and are slidably connected to their respective flange-type quick-change bushings 2. Under normal use, since the sprocket shaft is solid and has high rigidity, and the sprocket shaft and the flange-type quick-change bushing 2 are adapted to be assembled together, the compressive stress on the flange-type quick-change bushing 2 will be distributed to the sprocket shaft to avoid stress deformation.

[0022] In this embodiment, the two side walls of the connecting seat 3 with the collar are both recessed inward to form arc-shaped concave surfaces. The rotating sleeve assembly 4 needs to swing, and the overall outline of the rotating sleeve assembly 4 in cross-section is an elongated ellipse, that is, both sides of the swing are arc-shaped extensions. In order to prevent interference and collision when the rotating sleeve assembly 4 rotates, the arc-shaped concave surfaces are matched with the two ends of the rotating sleeve assembly 4.

[0023] In this embodiment, one end of the flange-type quick-change bushing 2 is integrally formed with a mounting head. One end of the mounting head extends outward to a mounting platform 12 and has a set of threaded holes. The mounting platform 12 can be used to connect with the unloading sleeve via bolts and the aforementioned threaded holes. The mounting head also integrally extends outward with a limiting flange 9, located below the mounting platform 12. One side wall of the connecting seat 3 integrally extends outward with a limiting stop pin 8, which abuts against the limiting flange 9 to restrict the axial rotation of the flange-type quick-change bushing 2. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tensile-resistant lotus head device, characterized in that: The assembly includes a connecting seat (3), a flange-type quick-change bushing (2), a rotating sleeve assembly (4), and a sprocket shaft system. The connecting seat (3) has a threaded hole in the middle and a pair of collars extending symmetrically from the two side walls. The flange-type quick-change bushing (2) passes through the connecting seat (3) and is sleeved with the rotating sleeve assembly (4). The sprocket shaft system includes an upper sprocket shaft (10) and a lower sprocket shaft (11), which respectively pass through their corresponding flange-type quick-change bushings (2) and are slidably connected to them.

2. The tensile-resistant lotus head device according to claim 1, characterized in that: The flange-type quick-change bushing (2) is a straight roller bushing with a roller groove on its inner wall. Multiple rollers (13) slide in the roller groove, and the rollers (13) abut against the outer walls of the upper sprocket shaft (10) and the lower sprocket shaft (11).

3. The tensile-resistant lotus head device according to claim 2, characterized in that: One end of the flange quick-change bushing (2) is provided with a pair of annular grooves, and an elastic retaining ring (7) is provided in the annular groove. The elastic retaining ring (7) is snapped onto the flange quick-change bushing (2) and arranged on the top and bottom side walls of the aluminum sleeve (1).

4. The tensile-resistant lotus head device according to claim 1, characterized in that: The two side walls of the connecting seat (3) are recessed inward to form an arc-shaped concave surface, which matches the arc-shaped extensions at both ends of the rotating sleeve assembly (4).

5. A tensile-resistant lotus head device according to claim 4, characterized in that: One end of the flange-type quick-change bushing (2) is integrally formed with an installation fixing head. The installation fixing head extends outward to form an installation platform (12). The installation platform (12) has a threaded hole for connecting with the unloading sleeve by bolts. The installation fixing head is also integrally formed with a limit flange (9).

6. A tensile-resistant lotus head device according to claim 5, characterized in that: The connecting seat (3) has a limit stop pin (8) extending outward from one side wall. The limit stop pin (8) abuts against the limit protrusion (9) to restrict the axial rotation of the flange quick-change bushing (2).

7. The tensile-resistant lotus head device according to claim 1, characterized in that: The upper sprocket shaft (10) in the sprocket shaft system has a first sprocket (5) integrally formed at the top end and a first disc below it. The lower sprocket shaft (11) has a second disc integrally formed at the top end and a second sprocket (6) below it. The upper sprocket shaft (10) and the lower sprocket shaft (11) achieve synchronous rotation through sprocket meshing.

8. A tensile-resistant lotus head device according to claim 7, characterized in that: The upper sprocket shaft (10) and the lower sprocket shaft (11) are provided with snap-fit ​​grooves (14) at their bottoms. The snap-fit ​​grooves (14) are in the shape of a curved L and extend upward from the bottom of the sprocket shaft.

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