Detection size adjustable testing fixture for bicycle rear fork
By designing an adjustable inspection tool for the rear fork of the bicycle, the problem of low accuracy and efficiency of traditional inspection methods is solved, automated inspection is realized, detection accuracy and efficiency are improved, and cost is reduced.
Patent Information
- Application Number
- CN202422010438.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-20
AI Technical Summary
In the prior art, the detection method of bicycle rear bottom forks relies on manual judgment, resulting in low detection accuracy and efficiency, making it difficult to ensure that the welding quality and specifications of rear bottom forks comply with the standards.
An adjustable detection device for the rear fork of bicycle is designed. By setting a detection disc and an adjustable length measuring device at both ends of the adjustable length support device, the length adjustment structure of the fixed rod and the moving sleeve is used to adapt to the rear fork of different models to realize automated detection.
It improves the detection accuracy and efficiency, reduces the difficulty of quality inspection of the rear lower fork, increases the factory pass rate, has low cost, large detection range and high usage value.
Smart Images
Figure CN222895644U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of inspection tools, and in particular relates to an inspection tool with adjustable size for a bicycle rear fork. Background Art
[0002] The rear fork of a bicycle usually includes a seat fork (also called a vertical fork) and a chain fork (also called a flat fork). The chain fork is composed of two symmetrical horizontal chain fork tubes to form a clamp shape, and one end of the two chain fork tubes are connected together by welding with a five-way pipe, while the other end is provided with a through hole for connecting to the corresponding side of the tire center axis. Generally speaking, the two chain stay tubes should be symmetrical about the vertical plane where the rear tire is located, and have a certain opening to accommodate the tire; when the two chain stay tubes are placed horizontally, one end face (also a curved surface) where the chain stay tubes are welded to the bottom bracket tube should also be tightly attached to the curved surface of the bottom bracket tube, and the welding ends of the two chain stay tubes should be symmetrical; since there is deformation in the welding process, in order to ensure the welding accuracy of the chain stays, the welding quality of the two chain stay tubes and the bottom bracket tube needs to be inspected after the welding is completed. In the prior art, after the chain stays of the bicycle are manufactured according to certain standards, whether the two chain stay tubes are symmetrical can only be judged by the naked eye, and the manual inspection method makes the measurement of the opening of the chain stays inaccurate, making it difficult to check whether the chain stays of the bicycle meet the specifications, and the inspection efficiency is low. Therefore, it is necessary to make improvements to the above problems. Utility Model Content
[0003] The technical problem solved by the utility model is to provide a size-adjustable inspection tool for bicycle rear forks, by respectively arranging an inspection disk and a length-adjustable distance-measuring device at both ends of a length-adjustable support device, and inspecting the two rear lower fork tubes according to the relative positions of the welding ends and the tire connection ends of the two rear lower fork tubes and the inspection disk and the length-adjustable distance-measuring device, thereby solving the problems of low inspection accuracy and efficiency of the traditional manual inspection method, and adopting a length adjustment structure of adaptive connection between a fixed rod and a movable sleeve, which can meet the inspection of rear forks of different models, does not need to be disassembled, assembled or replaced, has a large inspection range, reduces the difficulty of quality inspection of rear lower forks, improves inspection accuracy and efficiency, has a high factory qualified rate, low cost, a large inspection range and high use value.
[0004] The technical solution adopted by the utility model is as follows: a size-adjustable inspection tool for a bicycle rear fork, comprising an inspection plate for inspecting the positions of welding ends of two rear lower fork tubes and a five-way tube of a rear lower fork, the inspection plate being centrally mounted on one end of a length-adjustable support device, and length-adjustable distance measuring devices which are axially perpendicular to and coaxially arranged with the adjustable support device being fixed on both side walls of the other end of the length-adjustable support device, the length-adjustable distance measuring devices comprising a fixed rod and a movable sleeve, the position of the movable sleeve being adjustably fixed on the fixed rod, and a positioning convex column being concentrically arranged on the outer end surface of the movable sleeve, the distance between the outer end surface of the movable sleeve and the same side wall of the other end of the length-adjustable support device is adjusted, and the two rear lower fork tubes are inspected by judging the relative positions of the two rear lower fork tubes, the movable sleeve and the positioning convex column.
[0005] Among them, the length-adjustable supporting device includes a T-shaped guide rod and an adjusting rod, a guide groove is formed at the bottom of the T-shaped guide rod, and one end of the adjusting rod is adapted to be inserted into the guide groove, and a plurality of waist-shaped long grooves are evenly distributed on the upper end surface of the T-shaped guide rod along its length direction, and the screws passing through the waist-shaped long grooves are adapted to be connected with the threaded holes at the corresponding positions on the adjusting rod, so as to realize the fixed connection of the T-shaped guide rod and the adjusting rod with adjustable position, the detection plate is centrally installed on the outer end portion of the adjusting rod, and a fixing rod is coaxially and centrally fixed on the outer walls on both sides of the large head end of the T-shaped guide rod.
[0006] Furthermore, the fixed rod is a screw rod, and the movable sleeve is a sleeve structure with one end open and the other end sealed, and the opening of the movable sleeve is arranged inwardly, an internal thread is formed on the inner hole wall of the movable sleeve, and the movable sleeve is adaptably connected to the screw rod, and the movable sleeve can be moved inward or outward by rotating the movable sleeve, and a top screw for fixing it to the screw rod is threaded on the outer circumferential wall of the movable sleeve, and a positioning boss for adapting to the through hole of the tire connecting end of the rear lower fork tube is concentrically arranged on the outer end surface of the movable sleeve.
[0007] Furthermore, the upper and lower end surfaces of the screw rod are both provided with planes, and the planes are provided with engraved lines for accurately adjusting the extension size of the movable sleeve.
[0008] Furthermore, the pitch of the screw rod is such that the top screw is located on one of the planes on the outer wall of the screw rod when the movable sleeve rotates one circle.
[0009] The advantages of this utility model compared with the prior art:
[0010] 1. This technical solution solves the problem of low detection accuracy and efficiency of the traditional manual detection method by respectively arranging a detection plate and a length-adjustable distance measuring device at both ends of the length-adjustable support device, and detecting the two rear lower fork tubes according to the relative positions of the welding ends and the tire connection ends of the two rear lower fork tubes and the detection plate and the length-adjustable distance measuring device;
[0011] 2. This technical solution sets a detection plate at the small end of the length-adjustable support device. On the premise that the positioning boss on the outer end surface of the movable sleeve is adapted to the through hole at the tire connection end of the rear lower fork tube, by observing whether the inner side walls of the two rear lower fork tube welding ends are tangentially in contact with the detection plate, it can be determined whether the welding of the two rear lower fork tubes is qualified, thereby eliminating the step of manual measurement and making the detection convenient, fast and efficient.
[0012] 3. This technical solution adopts a length-adjustable support device formed by the adjustable installation of the T-shaped guide rod and the adjustment rod, which provides conditions for adjusting the distance between the detection plate and the distance measuring axis, thereby meeting the detection of rear chain forks of different models and improving the detection range;
[0013] 4. This technical solution adopts a length adjustment structure with a fixed rod and a movable sleeve threaded connection, which can meet the detection of different types of rear forks without disassembly and replacement, and the adjustment is convenient and fast, with a large detection range;
[0014] 5. This technical solution has a simple structure and novel design. It meets the detection requirements of chainstays with different signals, reduces the difficulty of chainstay quality detection, improves detection accuracy and efficiency, has a high factory qualified rate, low cost, large detection range, and high use value. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 This is a cross-sectional view of the connection structure between the fixed rod and the movable sleeve of the utility model. DETAILED DESCRIPTION
[0017] The following will be combined with the embodiment of the present utility model Figure 1-2 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0019] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.
[0020] The adjustable size inspection tool for bicycle rear fork comprises an inspection plate 1 for inspecting the position of the welding ends of two rear lower fork tubes 3 and five-way tube 4 of the rear lower fork, the inspection plate 1 is centrally installed on one end of a length-adjustable support device 2, and the two side walls of the other end of the length-adjustable support device 2 are fixed with length-adjustable distance measuring devices 5 which are axially perpendicular and coaxially arranged with the adjustable support device 2, the length-adjustable distance measuring device 5 comprises a fixed rod 5-1 and a movable sleeve 5-2, the position of the movable sleeve 5-2 is adjustably fixed on the fixed rod 5-1, and the outer end surface of the movable sleeve 5-2 is concentrically provided with a positioning boss 5-3, the distance between the outer end surface of the movable sleeve 5-2 and the same side wall of the other end of the length-adjustable support device 2 is adjusted, and the distance between the outer end surface of the movable sleeve 5-2 and the same side wall of the other end of the length-adjustable support device 2 is determined by judging the distance between the two rear lower fork tubes 3 and the movable sleeve 5-2 and the positioning boss 5 -3 to detect the two rear lower fork tubes 3; in the above structure, by respectively arranging the detection disk 1 and the length-adjustable distance-measuring device 5 at both ends of the length-adjustable support device 2, and detecting the two rear lower fork tubes 3 according to the relative positions of the welding ends and the tire connection ends of the two rear lower fork tubes 3 with the detection disk 1 and the length-adjustable distance-measuring device 2, the problems of low detection accuracy and efficiency of the traditional manual detection method are solved; by arranging the detection disk at the small head end of the length-adjustable support device 2, on the premise that the positioning boss 5-3 on the outer end face of the movable sleeve 5-2 is adapted to the through hole at the tire connection end of the rear lower fork tube 3, by observing whether the inner side walls of the welding ends of the two rear lower fork tubes 3 are in tangential contact with the detection disk 1, it can be determined whether the welding of the two rear lower fork tubes 3 is qualified, eliminating the steps of manual measurement, and the detection is convenient, fast and efficient;
[0021] The specific structure of the length-adjustable support device 2 is as follows: the length-adjustable support device 2 comprises a T-shaped guide rod 2-1 and an adjusting rod 2-2, the bottom of the T-shaped guide rod 2-1 is provided with a guide groove, and one end of the adjusting rod 2-2 is adapted to be inserted into the guide groove, the upper end surface of the T-shaped guide rod 2-1 is uniformly provided with a plurality of waist-shaped long grooves 2-3 along its length direction, and the screws 2-4 passing through the waist-shaped long grooves 2-3 are adapted to be connected with the threaded holes 2-5 at the corresponding positions on the adjusting rod 2-2, The T-shaped guide rod 2-1 and the adjusting rod 2-2 are fixedly connected in an adjustable position, the detection plate 1 is centrally installed on the outer end of the adjusting rod 2-2, and the fixing rods 5-1 are coaxially fixed in the center on both sides of the outer wall of the large end of the T-shaped guide rod 2-1; in the above structure, the length-adjustable support device formed by the adjustable position installation of the T-shaped guide rod and the adjusting rod provides conditions for adjusting the distance between the detection plate and the distance measuring axis, thereby meeting the detection of rear chain forks of different models and improving the detection range;
[0022] The adaptable connection structure of the fixed rod 5-1 and the movable sleeve 5-1 is as follows: the fixed rod 5-1 is a screw rod, and the movable sleeve 5-2 is a set structure with one end open and the other end sealed, and the opening of the movable sleeve 5-2 is arranged inward, and the inner hole wall of the movable sleeve 5-2 is formed with an internal thread, and the movable sleeve 5-2 is adaptably connected to the screw rod, and the movable sleeve 5-2 can be moved inward or outward by rotating the movable sleeve 5-2. The outer circumferential wall of the movable sleeve 5-2 is threadedly connected with a top screw 5-5 that fixes it to the screw rod, and a positioning boss 5-3 used to adapt to the through hole of the tire connection end of the rear lower fork tube 3 is concentrically arranged on the outer end surface of the movable sleeve 5-2; the length adjustment is adopted by the threaded connection of the fixed rod and the movable sleeve The structure can meet the detection of rear forks of different models, without the need for disassembly and replacement, and the adjustment is convenient and fast, with a large detection range; specifically, the upper and lower end surfaces of the screw rod are both formed with planes 5-4, and the plane 5-4 is formed with scale lines 5-6 for accurately adjusting the extension size of the movable sleeve 5-2. According to the model of the rear lower fork tube 3, the movable sleeve 5-2 is rotated to the width size corresponding to the rear lower fork model with the top screw 5-5 loosened, and then the movable sleeve 5-2 is fixed to the fixed rod 5-1 through the top screw 5-5. The specific adjustment length can be quickly determined by the scale lines 5-6, and whether the outer end surface of the movable sleeve 5-2 is in contact with the inner wall of the through hole position of the rear lower fork tube 3 is observed to determine whether the opening width of the two broken rear lower fork tubes 3 meets the requirements;
[0023] The pitch of the screw rod is such that the top screw 5-5 is located on one of the planes 5-4 on the outer wall of the screw rod when the movable sleeve 5-2 rotates one circle. Figure 2As shown, the plane 5-4 does not extend to the lower end of the screw rod, so that the lower end of the plane 5-4 has a positioning surface, thereby realizing the lower positioning of the movable sleeve 5-2 in cooperation with the top screw 5-5, avoiding the movable sleeve 5-2 from being separated from the screw rod, and it is also the limit position of the outward movement of the movable sleeve 5-2. Specifically, the pitch of the screw rod is 0.5mm or 1mm. This pitch is conducive to the top screw 5-5 on the movable sleeve 5-2 to correspond to one of the planes 5-4 on the outer wall of the screw rod after the movable sleeve 5-2 rotates one circle, which is convenient for the top screw to tighten the plane 5-4 for positioning and avoid affecting the external thread of the screw rod.
[0024] The technical solution has a simple structure and a novel design, meets the detection requirements of chainstays with different signals, reduces the difficulty of chainstay quality detection, improves detection accuracy and efficiency, has a high factory qualified rate, low cost, a large detection range, and high use value.
[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A size-adjustable inspection tool for a bicycle rear fork, comprising an inspection plate (1) for inspecting the positions of the welding ends of two rear fork tubes (3) and a bottom bracket tube (4) of the rear fork, wherein the inspection plate (1) is centrally mounted on one end of a length-adjustable support device (2), and is characterized in that: On the two side walls at the other end of the length-adjustable support device (2), there are fixed length-adjustable distance measuring devices (5) arranged perpendicularly and coaxially with the adjustable support device (2), the length-adjustable distance measuring devices (5) comprising a fixed rod (5-1) and a movable sleeve (5-2), the movable sleeve (5-2) being fixed on the fixed rod (5-1) in an adjustable manner, and a positioning convex column (5-3) being coaxially arranged on the outer end surface of the movable sleeve (5-2), the distance between the outer end surface of the movable sleeve (5-2) and the same side wall at the other end of the length-adjustable support device (2) being adjusted, and the two rear lower fork tubes (3) being detected by judging the relative positions of the two rear lower fork tubes (3), the movable sleeve (5-2) and the positioning convex column (5-3).
2. The adjustable size inspection tool for bicycle rear fork according to claim 1 is characterized in that: The length-adjustable support device (2) comprises a T-shaped guide rod (2-1) and an adjustment rod (2-2); a guide groove is formed at the bottom of the T-shaped guide rod (2-1), and one end of the adjustment rod (2-2) is inserted into the guide groove; a plurality of waist-shaped long grooves (2-3) are evenly distributed on the upper end surface of the T-shaped guide rod (2-1) along its length direction; screws (2-4) passing through the waist-shaped long grooves (2-3) are adapted to be connected with threaded holes (2-5) at corresponding positions on the adjustment rod (2-2), so as to realize a fixed connection between the T-shaped guide rod (2-1) and the adjustment rod (2-2) in an adjustable position; the detection plate (1) is centrally mounted on the outer end of the adjustment rod (2-2), and fixed rods (5-1) are coaxially and centrally fixed on the outer walls on both sides of the large end of the T-shaped guide rod (2-1).
3. The adjustable size inspection tool for bicycle rear fork according to claim 1 is characterized in that: The fixed rod (5-1) is a screw rod, the movable sleeve (5-2) is a sleeve structure with one end open and the other end sealed, and the movable sleeve (5-2) is arranged with its opening facing inward, an internal thread is formed on the inner hole wall of the movable sleeve (5-2), and the movable sleeve (5-2) is adaptively connected to the screw rod, and the movable sleeve (5-2) is moved inward or outward by rotating the movable sleeve (5-2), a top screw (5-5) for fixing the movable sleeve (5-2) to the screw rod is threadedly connected on the outer circumferential wall of the movable sleeve (5-2), and a positioning boss (5-3) for adapting to the through hole of the tire connection end of the rear lower fork tube (3) is coaxially arranged on the outer end surface of the movable sleeve (5-2).
4. The adjustable size inspection tool for bicycle rear fork according to claim 3 is characterized in that: Planes (5-4) are formed on the upper and lower end surfaces of the screw rod, and engraved lines (5-6) for accurately adjusting the extension size of the movable sleeve (5-2) are formed on the plane (5-4).
5. The adjustable size inspection tool for bicycle rear fork according to claim 3 or 4, characterized in that: The pitch of the screw rod is such that the top screw (5-5) is located on one of the planes on the outer wall of the screw rod when the movable sleeve (5-2) rotates one circle.