A spring retraction device
Patent Information
- Application Number
- CN202522522972.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-27
AI Technical Summary
在运输过程中，零部件因缺乏径向约束而频繁晃动，与支撑筒内壁发生碰撞，导致零部件表面损伤、质量下降，同时坚硬的零部件也可能导致支撑筒内壁产生压痕或形变
本实用新型的一个优势在于对称布置的至少两个支撑结构，每个支撑结构内含压缩弹簧和可沿定位销轴向滑动的压板，压缩弹簧通过其恢复力，持续为压板提供径向向外的推力，消除了零部件因与支撑筒内壁存在间隙而产生的晃动空间，有效防止了零部件与筒壁的碰撞，避免了零部件的表面损伤与质量下降，同时也防止了零部件从筒中脱落。
Smart Images
Figure CN224868928U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of parts transportation and packaging technology, and more specifically relates to a spring telescopic device. Background Technology
[0002] In fields such as military and precision instruments, valuable components such as carbon fiber are often transported vertically within the support cylinder of a parts storage box. In existing technology, the components are placed directly inside the support cylinder, with a gap between the components and the cylinder wall. During transportation, the lack of radial restraint causes frequent shaking, leading to collisions with the inner wall of the support cylinder. This results in surface damage and quality degradation of the components, and the hardness of the components can also cause indentations or deformation on the inner wall of the support cylinder. Furthermore, under severe vibration, there is a possibility that the components may detach from the cylinder. Utility Model Content
[0003] To solve the above problems and overcome the shortcomings of the prior art, this utility model provides a spring telescopic device; The technical problem to be solved is: how to limit the movement space of the components inside the support cylinder to prevent them from being damaged by collision due to shaking, while avoiding the device itself from causing indentations or deformation to the inner wall of the support cylinder.
[0004] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: a spring telescopic device includes: a baffle, and at least two support structures, wherein the two support structures are disposed on the same end face of the baffle; The support structure includes a base, a positioning pin, a pressure plate, and a compression spring; the base is fixedly installed on the baffle; the positioning pin passes through the base and one end of it is fixedly connected to the pressure plate; the compression spring is sleeved on the outside of the positioning pin, and its two ends abut against the base and the pressure plate respectively. The at least two support structures are arranged symmetrically with the central axis of the baffle as the axis of symmetry.
[0005] Furthermore, the end of the pressure plate away from the base has an arc-shaped contact surface.
[0006] Furthermore, the curvature of the arc-shaped contact surface is adapted to the curvature of the inner wall of the target support cylinder.
[0007] Furthermore, a limiting block is provided at one end of the positioning pin near the base; The base has a guide hole that matches the positioning pin along its axial direction, and a limiting groove that matches the limiting block. The limiting block is embedded in the limiting groove and can slide along it.
[0008] Furthermore, the locating pin and the pressure plate are connected by an interference fit.
[0009] Furthermore, the base is detachably fixed to the baffle by bolts.
[0010] Furthermore, the surface of the pressure plate is provided with a snap groove.
[0011] Furthermore, the baffle, the base, and the pressure plate are all made of high-strength, wear-resistant nylon material.
[0012] Furthermore, the baffle is a rectangular plate-shaped component.
[0013] The beneficial effects of this utility model are: One advantage of this invention is the symmetrical arrangement of at least two support structures, each containing a compression spring and a pressure plate that can slide along the axial direction of the positioning pin. The compression spring, through its restoring force, continuously provides radial outward thrust to the pressure plate, eliminating the swaying space caused by the gap between the parts and the inner wall of the support cylinder, effectively preventing the parts from colliding with the cylinder wall, avoiding surface damage and quality degradation of the parts, and also preventing the parts from falling out of the cylinder.
[0014] One advantage of this invention is that the end of the pressure plate away from the base is machined with an arc-shaped contact surface, and the curvature of the arc-shaped contact surface is adapted to the curvature of the inner wall of the target support cylinder. This transforms the concentrated force generated by the compression spring and transmitted through the positioning pin into a uniformly distributed surface pressure that matches the shape of the cylinder wall. This increases the actual contact area between the pressure plate and the inner wall of the support cylinder, preventing indentations or plastic deformation of the inner wall of the support cylinder due to excessive local stress. This protects the structural integrity of the packaging container itself and extends its service life.
[0015] One advantage of this invention is that the base is detachably connected to the baffle via bolts, allowing each support structure to be quickly disassembled and installed as an independent module. When any support structure requires maintenance or replacement, the entire device does not need to be scrapped, facilitating repairs and reducing long-term operating costs. Attached Figure Description
[0016] Appendix Figure 1 This is a three-dimensional structural diagram of the present invention; Appendix Figure 2 This is a front view structural diagram of the present invention; Appendix Figure 3 This is a schematic cross-sectional view of the present invention; Appendix Figure 4 This is a schematic diagram of an embodiment of the present utility model; in the accompanying drawings: 1. Baffle; 2. Support structure; 21. Base; 211. Guide hole; 212. Limiting groove; 22. Positioning pin; 221. Limiting block; 23. Pressure plate; 231. Arc-shaped contact surface; 232. Buckle groove; 24. Compression spring. Detailed Implementation
[0017] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0018] The specific embodiment of this utility model: The spring telescopic device mainly consists of a rectangular baffle 1 and two identical support structures 2. The baffle 1 serves as the mounting base for the entire device and is made of high-strength, wear-resistant nylon, making it lightweight and sturdy. The two support structures 2 are symmetrically fixed to the same front end face of the baffle 1 by bolts and are symmetrically distributed about the longitudinal central axis of the baffle 1.
[0019] Each of the aforementioned support structures 2 includes a base 21, a positioning pin 22, a pressure plate 23, and a compression spring 24. The base 21 is made of high-strength, wear-resistant nylon and is detachably mounted on the baffle 1 by two bolts. The positioning pin 22 is a metal rod with an integrally formed limiting block 221 at one end near the base 21. The base 21 has a circular guide hole 211 that matches the positioning pin 22 along its axial direction, and a limiting groove 212 that matches the limiting block 221. During assembly, the positioning pin 22 passes through the guide hole 211, and the limiting block 221 on it is embedded in the limiting groove 212, so that the positioning pin 22 can only slide along the direction defined by the limiting groove 212.
[0020] The other end of the positioning pin 22 is fixedly connected to the mounting hole on the pressure plate 23 by an interference fit. The pressure plate 23 is made of high-strength wear-resistant nylon. The end of the pressure plate 23 away from the base 21 is machined with an arc-shaped contact surface 231. The radius of curvature of the arc-shaped contact surface 231 is designed to be equal to the radius of curvature of the inner wall of the target support cylinder 3 to ensure surface contact. The outer surface of the pressure plate 23 also has a groove 232 for easy finger application. The compression spring 24 is sleeved on the outside of the positioning pin 22, with one end abutting against the base 21 and the other end abutting against the pressure plate 23.
[0021] It should be noted that this utility model is a spring telescopic device, and in specific operation, In use, the operator uses one or both hands to grip the grooves 232 on the two pressure plates 23, applying opposing forces towards the center. The pressure plates 23 move the positioning pins 22 towards the center of the base 21, compressing the spring 24 and increasing the space between the two pressure plates 23. At this point, the device is placed into the support cylinder 3 containing the component 4, and the baffle 1 is placed over the opening of the support cylinder 3. Then, the force applied to the pressure plates 23 is slowly released, causing the spring 24 to release its elastic potential energy, pushing the two pressure plates 23 to move in opposite directions until their arc-shaped contact surfaces 231 are tightly and evenly pressed against the inner wall of the support cylinder 3. The continuous pressing force generated by the springs indirectly acts through the pressure plates 23, stably pressing the component 4 into the center of the support cylinder 3, thus achieving the purpose of preventing shaking, collision, and falling. When removal is needed, simply squeeze the two pressure plates 23 again to easily remove the device.
[0022] This utility model has a simple structure and is easy to manufacture. Through a purely mechanical structure, it achieves intelligent and non-destructive clamping of parts, making it particularly suitable for the transportation and storage packaging of precision parts. The basic principles, main features, and advantages of this utility model have been shown and described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A spring telescopic device, characterized in that, include: A baffle (1), and at least two support structures (2), the two support structures (2) being disposed on the same end face of the baffle (1); The support structure (2) includes a base (21), a positioning pin (22), a pressure plate (23), and a compression spring (24); the base (21) is fixedly installed on the baffle (1); the positioning pin (22) passes through the base (21) and one end of it is fixedly connected to the pressure plate (23); the compression spring (24) is sleeved on the outside of the positioning pin (22), and its two ends abut against the base (21) and the pressure plate (23) respectively; The at least two support structures (2) are arranged symmetrically with the central axis of the baffle (1) as the axis of symmetry.
2. The spring telescopic device according to claim 1, characterized in that: The end of the pressure plate (23) away from the base (21) has an arc-shaped contact surface (231).
3. The spring telescopic device according to claim 2, characterized in that: The curvature of the arc-shaped contact surface (231) is adapted to the curvature of the inner wall of the target support cylinder.
4. The spring telescopic device according to claim 1, characterized in that: The positioning pin (22) has a limiting block (221) at one end near the base (21); The base (21) has a guide hole (211) that matches the positioning pin (22) along its axial direction, and a limiting groove (212) that matches the limiting block (221). The limiting block (221) is embedded in the limiting groove (212) and can slide along it.
5. The spring telescopic device according to claim 1, characterized in that: The locating pin (22) and the pressure plate (23) are connected by an interference fit.
6. The spring telescopic device according to claim 1, characterized in that: The base (21) is detachably fixed to the baffle (1) by bolts.
7. The spring telescopic device according to claim 1, characterized in that: The surface of the pressure plate (23) is provided with a groove (232).
8. The spring telescopic device according to claim 1, characterized in that: The baffle (1), the base (21) and the pressure plate (23) are all made of high-strength wear-resistant nylon material.
9. The spring telescopic device according to claim 1, characterized in that: The baffle (1) is a rectangular plate-shaped component.