suction tube installation structure

Abstract

This utility model discloses a suction cylinder installation structure, relating to the field of blow molding bottle production technology. The structure includes a suction cylinder body, a hand plate, and a suction fixing screw connecting the two. An elastic washer is fitted on the suction fixing screw. The washer has a spherical structure with a through hole in the middle to accommodate the screw rod. The edge is pressed against the bottom of the suction cylinder. The outer arc surface is elastically deformed by the pressure of the screw head, forming a reverse preload. Through the compensation effect of the elastic washer, the loosening of the suction fixing screw under high-speed vibration environment is effectively suppressed, ensuring the stability of vacuum adsorption and improving the production efficiency and equipment reliability of blow molding bottles.

Description

Technical Field

[0001] This utility model relates to the field of blow molding bottle production technology, and more specifically, to a preform suction cylinder installation structure. Background Technology

[0002] In blow molding bottle production, the preform suction cylinder is mounted to the hand plate via suction fixing screws, utilizing negative pressure to suction the preform for blow molding. In existing technologies, the suction cylinder operates under high-frequency vibration for extended periods, causing the fixing screws to gradually loosen due to mechanical fatigue. This leads to the following problems: loose screws cause seal failure, water leakage into the suction channel, and a decrease in vacuum suction force; the clearance between the suction cylinder and the hand plate increases, reducing preform positioning accuracy; frequent shutdowns for screw tightening disrupt production continuity. Existing solutions often rely on adding thread-locking adhesive or periodic maintenance, but these cannot achieve long-term anti-loosening under vibration conditions. Therefore, a simple and highly reliable anti-loosening design is urgently needed. Utility Model Content

[0003] The present invention provides a suction cylinder mounting structure that can alleviate the above-mentioned problems.

[0004] To alleviate the above problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a suction cylinder mounting structure, including a suction cylinder body and a palm plate. The suction cylinder body is mounted on the palm plate by a suction fixing screw, and the suction fixing screw is fitted with an elastic washer. The elastic washer has a spherical structure with a through hole in its middle to match and fit with the screw rod of the suction fixing screw. Its edge is pressed against the suction cylinder inlay of the suction cylinder body, and its outer arc surface is squeezed by the head of the suction fixing screw. Through elastic deformation, a reverse preload force is generated to suppress the loosening of the suction fixing screw in a vibration environment.

[0006] Furthermore, the radius of curvature of the spherical structure of the elastic washer matches the curvature of the contact surface of the head of the suction fixing screw to increase the contact area and evenly distribute the reverse preload.

[0007] Preferably, the elastic gasket is made of an elastic composite material, which includes a fatigue-resistant metal matrix and a flexible sealing layer covering the surface, so as to simultaneously achieve vibration fatigue resistance and contact surface sealing reinforcement.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] 1) The spherical structure of the elastic gasket dynamically compensates for the displacement of the suction fixing screw caused by vibration through reverse preload, significantly reducing the risk of loosening of the suction fixing screw and avoiding the attenuation of vacuum adsorption force due to water seepage.

[0010] 2) The edge of the elastic gasket presses against the bottom of the preform suction cylinder, enhancing the contact seal between the preform suction cylinder and the palm plate, ensuring accurate preform adsorption and positioning, and improving the quality of blow molding.

[0011] 3) The combination of the elastic washer and the suction fixing screw eliminates the need for additional auxiliary materials (such as thread sealant), reducing downtime maintenance frequency and extending equipment lifespan.

[0012] 4) The spherical gasket through hole is precisely matched with the suction fixing screw. During installation, only conventional tightening operations are required to achieve adaptive pre-tightening, simplifying the assembly process.

[0013] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, embodiments of this utility model are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 It is an assembly cross-sectional view of the suction cylinder body, elastic gasket and suction fixing screw;

[0016] Figure 2 It is an assembly appearance diagram of the suction cylinder body and the palm plate;

[0017] Figure 3 This is a partial cross-sectional view of the assembly of the suction cylinder body and the palm plate;

[0018] Figure 4 This is a second partial sectional view of the assembly of the suction cylinder body and the palm plate;

[0019] Figure 5 This is a structural diagram of an elastic gasket;

[0020] In the diagram: 1-Suction tube outer sleeve, 2-Suction tube inner sleeve, 3-Suction tube bottom insert, 4-Elastic gasket, 5-Suction fixing screw, 6-Suction tube body, 7-Palm plate, 8-Palm plate suction channel. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a suction cylinder mounting structure, including a suction cylinder body 6 and a palm plate 7. The suction cylinder body 6 includes a suction cylinder outer sleeve 1, a suction cylinder inner sleeve 2, and a suction cylinder base 3. The suction cylinder body 6 is mounted to the palm plate 7 by suction fixing screws 5. The middle channel of the suction fixing screws 5 connects the suction cylinder inner sleeve 2 and the palm plate suction channel 8. Figure 4 As shown.

[0023] The suction fixing screw 5 is fitted with an elastic washer 4; the elastic washer 4 is as follows: Figure 5 The spherical structure shown has a through hole in its center to fit the screw portion of the suction fixing screw 5. Its edge is pressed against the suction cylinder base 3 of the suction cylinder body 6, and its outer arc surface is compressed by the head of the suction fixing screw 5. Figure 1 As shown.

[0024] When the suction screw 5 is tightened, the head of the suction screw 5 presses against the outer arc surface of the elastic washer 4, forcing the spherical body to undergo elastic deformation and generating a reverse preload force. This preload force continuously acts between the head of the suction screw 5 and the bottom insert 3 of the suction cylinder, forming a dynamic compensation mechanism. Under vibration conditions, if the suction screw 5 becomes slightly loose, the elastic washer 4 will offset the loose displacement in real time through deformation recovery force, maintaining the screw's tightness.

[0025] In an optional embodiment of this invention, the radius of curvature of the spherical structure of the elastic gasket 4 matches the curvature of the contact surface of the head of the suction fixing screw 5, maximizing the contact area between the two. This curvature matching ensures that pressure is evenly distributed throughout the contact area, avoiding localized stress concentration. The evenly distributed preload further optimizes the elastic deformation range of the gasket, reducing fatigue cracking caused by uneven stress.

[0026] In an optional embodiment of the present invention, the elastic gasket 4 is made of an elastic composite material, which includes a fatigue-resistant metal matrix (such as stainless steel) and a flexible sealing layer (such as silicone) covering the surface.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A suction cylinder mounting structure comprising a suction cylinder body (6) and a palm plate (7), the suction cylinder body (6) being mounted to the palm plate (7) by a suction fixing screw (5), characterized in that: The suction fixing screw (5) is fitted with an elastic washer (4); the elastic washer (4) is a spherical structure with a through hole in its middle to match the screw part of the suction fixing screw (5), its edge is pressed against the suction cylinder inlay (3) of the suction cylinder body (6), and its outer arc surface is squeezed by the head of the suction fixing screw (5) to generate a reverse preload force through elastic deformation.

2. The aspirator cartridge mounting structure of claim 1, wherein: The radius of curvature of the spherical structure of the elastic gasket (4) matches the curvature of the contact surface of the head of the suction fixing screw (5).

3. The aspirator cartridge mounting structure of claim 1, wherein: The elastic gasket (4) is made of an elastic composite material, which includes a fatigue-resistant metal matrix and a flexible sealing layer covering the surface.

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