A kind of badminton racket rod internal reinforcing rib installation auxiliary device

Abstract

The utility model relates to badminton racket manufacturing technical field, concretely is a kind of badminton racket pole internal reinforcing rib installation auxiliary device, including guide head, the guide head is detachably connected in the front end of reinforcing rib, coaxially is provided with transition sleeve behind it, the transition sleeve is sleeved in the outer periphery of reinforcing rib, and its front end inner wall is embedded with elastic guide ring, and the outer periphery of transition sleeve is slidably sleeved with split positioning sleeve, the rear end outside of transition sleeve is fixedly connected with handle connecting seat, adjusting screw is penetrated and is connected in the both sides of handle connecting seat, the rear end of adjusting screw is penetrated the axial through-hole on handle connecting seat, and with handle connecting seat rotation cooperation.This badminton racket pole internal reinforcing rib installation auxiliary device can make reinforcing rib when entering racket pole can be naturally centered, smoothly slide, reduce the impact and friction to inner wall, improve the smoothness and consistency of installation, simple structure is practical, it is convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of badminton racket manufacturing technology, specifically to an auxiliary device for installing internal reinforcing ribs on a badminton racket shaft. Background Technology

[0002] Badminton demands high racket performance, especially in terms of stability and torsional rigidity during shots. To enhance overall racket strength, modern badminton rackets often incorporate reinforcing ribs within the shaft, increasing rigidity and durability. With the growing demand for high-performance rackets, the precise and efficient installation of these reinforcing ribs within the slender, hollow shaft has become a crucial aspect of the manufacturing process.

[0003] Currently, when inserting reinforcing ribs into badminton racket shafts, manual hand-held or simple clamp-assisted positioning and pushing methods are commonly used. Due to the confined space and slender walls inside the shaft, operators must align the rib with the inlet while slowly pushing it in. Even slight deviations can cause the reinforcing rib to shift or become stuck during insertion. Furthermore, the tip of the reinforcing rib is prone to directly impacting the inner wall of the shaft during insertion, damaging the surface and affecting structural integrity. This can also lead to deformation of the rib itself, consequently affecting subsequent bonding and overall mechanical properties. This problem is particularly prominent in mass production, directly impacting assembly efficiency and product yield. Utility Model Content

[0004] The purpose of this utility model is to provide an auxiliary device for installing internal reinforcing ribs in badminton racket shafts, so as to solve the problem mentioned in the background art that the front end of the reinforcing rib is prone to directly impacting or scratching the inner wall when it is installed in the racket shaft, resulting in damage to the inner wall of the racket shaft, deformation of the reinforcing rib, and assembly jamming.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary device for installing an internal reinforcing rib of a badminton racket shaft, comprising a guide head, the guide head being detachably connected to the front end of the reinforcing rib, and a transition sleeve being coaxially arranged behind it. The transition sleeve is fitted around the outer periphery of the reinforcing rib, and an elastic guide ring is embedded in the inner wall of its front end. A segmented positioning clip is slidably fitted around the outer periphery of the transition sleeve. An adjusting screw is threadedly connected to the segmented positioning clip. A handle connecting seat is fixedly connected to the outer rear end of the transition sleeve. The other end of the adjusting screw passes through an axial through hole on the handle connecting seat and rotatably engages with the handle connecting seat.

[0006] Preferably, the outer periphery of the front end of the guide head is provided with a 45° tapered chamfer, and the inner hole of the tail end is provided with an internal thread, which is adapted to the external thread at the end of the reinforcing rib to achieve a threaded connection.

[0007] Preferably, the transition sleeve is a 304 stainless steel pipe with a wall thickness of 0.5mm, its inner diameter is 0.2mm larger than the outer diameter of the reinforcing rib, and its total length is 100mm. The inner wall of the front end is provided with an annular groove with a rectangular cross section, and the elastic guide ring is embedded in the annular groove.

[0008] Preferably, the elastic guide ring is made of three arc-shaped polyurethane ring petals spliced ​​together. The inner diameter of each ring petal is 0.1 mm smaller than the outer diameter of the reinforcing rib. After splicing, a complete ring is formed, and a gap of 0.3 mm is left between adjacent ring petals.

[0009] Preferably, the segmented positioning sleeve is composed of two symmetrical semi-circular arc-shaped clamps, each clamp having axial anti-slip teeth on its inner side, and the two clamps are radially clamped and released by set screws on the sides.

[0010] Preferably, the handle connector is an integrated structure made of aluminum alloy, with a countersunk hole at the front end that matches the outer diameter of the transition sleeve for welding and fixing, and bearing seats with internal threads on both sides, which are equipped with deep groove ball bearings. The adjusting screw passes through the inner ring of the bearing to achieve circumferential rotation support.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This auxiliary device for installing internal reinforcing ribs in badminton racket shafts allows the reinforcing ribs to naturally center and slide smoothly into the shaft, reducing impact and friction on the inner wall, improving the smoothness and consistency of installation, and featuring a simple, practical, and easy-to-operate structure. The device achieves initial centering through the tapered front end design of the guide head, while the elastic guide ring provides dynamic fit and positioning. Combined with the linkage clamping structure of the segmented positioning sleeve and the adjusting screw, it ensures overall coaxial stability during the advancement process. The handle connecting seat provides reliable grip and rotational support, effectively avoiding problems such as reinforcing rib misalignment, jamming, and damage to the inner wall, significantly improving assembly accuracy and operational efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the auxiliary device for installing internal reinforcing ribs of a badminton racket shaft according to the present invention.

[0013] Figure 2 This is a schematic diagram of the overall external structure of an auxiliary device for installing internal reinforcing ribs on a badminton racket shaft according to the present invention.

[0014] Figure 3 This is a schematic diagram of the connection structure between the segmented positioning clip and the transition sleeve of the auxiliary device for installing the internal reinforcing ribs of a badminton racket shaft according to the present invention.

[0015] In the diagram: 1. Guide head; 2. Transition sleeve; 3. Elastic guide ring; 4. Split positioning sleeve; 5. Adjusting screw; 6. Handle connecting seat. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: an auxiliary device for installing the internal reinforcing rib of a badminton racket shaft, including a guide head 1, which is detachably connected to the front end of the reinforcing rib. A transition sleeve 2 is coaxially arranged behind the guide head 1, which is sleeved on the outer periphery of the reinforcing rib. An elastic guide ring 3 is embedded in the inner wall of the front end of the transition sleeve 2, and a segmented positioning clip 4 is slidably fitted on the outer periphery of the transition sleeve 2. A handle connecting seat 6 is fixedly connected to the outer rear end of the transition sleeve 2. Adjusting screws 5 are connected through both sides of the handle connecting seat 6. The front end of the adjusting screw 5 is provided with a pressing port that cooperates with the end structure of the segmented positioning clip 4, and the rear end of the adjusting screw 5 passes through the handle connecting seat 6. The axial through hole is rotatably engaged with the handle connecting seat 6. In this structure, when the guide head 1 is threadedly connected to the front end of the reinforcing rib, and then the transition sleeve 2 is fitted onto the reinforcing rib, the elastic guide ring 3 embedded in the inner wall of its front end is tightly attached to the outer wall of the reinforcing rib, playing a preliminary centering and buffering role. The operator holds the handle connecting seat 6 and aligns it with the inlet of the racket shaft. The conical front end of the guide head 1 first probes into the inner hole of the racket shaft. At the moment of contact, the inclined surface guides the automatic centering, avoiding the front end from directly hitting the inner wall and causing scratches or deformation. As the pushing action proceeds, the transition sleeve 2 drives the whole to move forward synchronously. At this time, the split positioning sleeve 4 slides along the transition sleeve 2 under the action of external force. The adjusting screw 5 passes through the through hole of the handle connecting seat 6 and forms a rotational support with it, ensuring smooth and axial force transmission during the propulsion stroke. Furthermore, since the split positioning sleeve 4 and the adjusting screw 5 are connected by threads, the preload can be adjusted before assembly to ensure the device and reinforcing rib remain stable and coaxial, preventing swaying. Throughout the process, the guide head 1 effectively disperses contact stress, and the elastic guide ring 3 continuously fits and positions itself. Combined with the stable grip provided by the handle connecting seat 6 and the guiding support of the adjusting screw 5, the reinforcing rib can slide smoothly and steadily along the shaft axis, significantly reducing the risk of jamming, scratching, and deformation caused by human error, thus solving the problem of… Existing technologies suffer from problems such as damage to the inner wall of the drumstick, unstable installation quality of reinforcing ribs, and low production efficiency due to a lack of effective guidance and stable support. The guide head 1 features a 45° tapered chamfer on its front outer periphery and an internal thread at its tail end that matches the external thread at the end of the reinforcing rib, achieving a threaded connection. This structure allows the guide head 1 to be quickly and accurately positioned and secured to the end of the reinforcing rib during installation. The tapered chamfer facilitates insertion into the drumstick inlet, and the threaded connection ensures no loosening during the pushing process. It is also easy to disassemble and suitable for continuous operation. The transition sleeve 2 is a 0.5mm thick 304 stainless steel pipe, with an inner diameter larger than the outer diameter of the reinforcing rib.The sleeve is 2mm thick and 100mm long. The inner wall of the front end has a rectangular annular groove into which the elastic guide ring 3 is embedded. This structure provides sufficient rigidity and lightweight support. The reasonable gap between the inner diameter and the reinforcing rib ensures smooth insertion. The annular groove precisely positions the elastic guide ring 3, preventing axial movement and ensuring stable and reliable guiding function. The elastic guide ring 3 is composed of three arc-shaped polyurethane ring segments, each with an inner diameter 0.1mm smaller than the outer diameter of the reinforcing rib. After splicing, they form a complete ring with a 0.3mm gap between adjacent segments. This structure utilizes the elastic deformation capability of the polyurethane ring segments to tightly fit the surface of the reinforcing rib during assembly, providing uniform radial support. Simultaneously, the gap between segments allows for slight expansion and contraction, adapting to minor dimensional fluctuations at different positions, effectively reducing vibration offset and improving guiding stability. The segmented positioning clip 4 consists of two symmetrical semi-circular clips, each clip... The inner side of the sleeve has axial anti-slip teeth. The two clamping bodies are radially clamped and released via set screws on the sides. This split positioning sleeve 4 allows for quick clamping and positioning. The anti-slip teeth enhance the clamping force on the transition sleeve 2. The external thread cooperates with the adjusting screw to transmit thrust. The set screw controls the clamping tightness, facilitating fixing or releasing in different positions and ensuring stable and reliable propulsion. The handle connecting seat 6 is an integrated structure made of aluminum alloy. Its front end has a countersunk hole matching the outer diameter of the transition sleeve 2 for welding fixation. Both sides have internally threaded bearing seats containing deep groove ball bearings. The adjusting screw 5 passes through the inner ring of the bearing to achieve circumferential rotation support. This structure of the handle connecting seat 6 achieves a combination of lightweight and high strength. The front countersunk hole welded to the transition sleeve 2 ensures a firm connection. The central bearing seat contains a deep groove ball bearing, providing circumferential rotation support for the adjusting screw 5, allowing it to feed smoothly without deflection during rotation, improving operational convenience and the stability of axial propulsion.

[0018] Working principle: When using this badminton racket shaft internal reinforcing rib installation auxiliary device, firstly, the guide head 1 is screwed onto the front external thread of the reinforcing rib through its internal thread at the tail. Then, the transition sleeve 2 is inserted into the reinforcing rib from the rear end, allowing the reinforcing rib to pass through its inner hole. At the same time, the elastic guide ring 3 is inserted along with the annular groove at the front end of the transition sleeve 2 and fits tightly against the outer wall of the reinforcing rib. Next, the two semi-circular clamps of the split positioning sleeve 4 are closed around the outer circumference of the transition sleeve 2, and radially locked by the set screw on the side. The other end of the adjusting screw 5 passes through the handle connecting seat 6. The axial through hole, the handle connecting seat 6 is pre-welded and fixed to the outer rear end of the transition sleeve 2 through the countersunk hole at its front end, and the adjusting screw 5 passes through the deep groove ball bearing in the bearing seat in the middle of the handle connecting seat 6 to achieve rotational support. The operator holds the handle connecting seat 6, aligns the assembled guide head 1 with the inner hole entrance of the badminton racket shaft, and slowly pushes it in. The conical front end of the guide head 1 first enters the inner hole of the racket shaft, and then the entire device drives the reinforcing rib to move forward synchronously. During this process, the adjusting screw 5 can be rotated as needed to adjust the position, thereby completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary device for installing internal reinforcing ribs on a badminton racket shaft, comprising a guide head (1), characterized in that: The guide head (1) is detachably connected to the front end of the reinforcing rib, and a transition sleeve (2) is coaxially arranged behind it. The transition sleeve (2) is sleeved on the outer periphery of the reinforcing rib, and an elastic guide ring (3) is embedded in the inner wall of its front end. A split positioning sleeve (4) is slidably fitted on the outer periphery of the transition sleeve (2). A handle connecting seat (6) is fixedly connected to the outer side of the rear end of the transition sleeve (2). An adjusting screw (5) is connected through both sides of the handle connecting seat (6). The rear end of the adjusting screw (5) passes through the axial through hole on the handle connecting seat (6) and rotates with the handle connecting seat (6).

2. A reinforcing rib installation aid for the interior of a badminton racket shaft according to claim 1, characterized in that: The guide head (1) has a 45° tapered chamfer on the outer periphery of the front end and an internal thread in the inner hole of the tail end, which is adapted to the external thread at the end of the reinforcing rib to achieve a threaded connection.

3. A reinforcing rib installation aid for the interior of a badminton racket shaft according to claim 1, characterized in that: The transition sleeve (2) is a 304 stainless steel pipe with a wall thickness of 0.5mm. Its inner diameter is 0.2mm larger than the outer diameter of the reinforcing rib, and its total length is 100mm. The inner wall of the front end is provided with an annular groove with a rectangular cross section. The elastic guide ring (3) is embedded in the annular groove.

4. A reinforcing rib installation aid for the interior of a badminton racket shaft according to claim 1, characterized in that: The elastic guide ring (3) is made of three arc-shaped polyurethane rings spliced ​​together. The inner diameter of each ring is 0.1 mm smaller than the outer diameter of the reinforcing rib. After splicing, a complete ring is formed, and a gap of 0.3 mm is left between adjacent rings.

5. A reinforcing rib installation aid for the interior of a badminton racket shaft according to claim 1, characterized in that: The segmented positioning sleeve (4) consists of two symmetrical semi-circular arc-shaped clamps. Each clamp has axial anti-slip teeth on its inner side. The two clamps are radially clamped and released by the set screws on the sides.

6. The auxiliary device for installing internal reinforcing ribs of a badminton racket shaft according to claim 1, characterized in that: The handle connector (6) is an integrated structure made of aluminum alloy. Its front end is provided with a countersunk hole that matches the outer diameter of the transition sleeve (2) for welding and fixing. Both sides are provided with bearing seats with internal threads, which are filled with deep groove ball bearings. The adjusting screw (5) passes through the inner ring of the bearing to achieve circumferential rotation support.

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