Detection tool for bicycle rear fork

Abstract

The detection tool for the bicycle rear fork comprises a detection disc used for detecting the welding end positions of two rear lower fork pipes and a five-way pipe of a rear lower fork, and the detection disc is installed in the middle of one end portion of a length-adjustable supporting device. A distance measuring shaft used for detecting the distance between tire connecting ends of two rear lower fork tubes of the rear lower fork is fixed in the middle of the other end of the length-adjustable supporting device, and the two rear lower fork tubes are detected by judging the relative positions of the two rear lower fork tubes, the distance measuring shaft and the detection disc. According to the utility model, the two ends of the length-adjustable supporting device are respectively provided with the detection disc and the distance measuring shaft, and the two rear lower forks are detected according to the relative positions of the welding ends and the tire connecting ends of the two rear lower forks and the detection disc and the distance measuring shaft, so that the problems of low detection precision and efficiency of a traditional manual detection mode are solved; the rear lower fork quality detection difficulty is reduced, the detection precision and efficiency are improved, the ex-factory qualified rate is high, the cost is low, the detection range is large, and the use value is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of inspection tools, and particularly relates to an inspection tool for a bicycle rear fork. Background Art

[0002] A bicycle rear fork generally includes a rear upper fork (also known as a vertical fork) and a rear lower fork (also known as a horizontal fork). The rear lower fork is formed by two symmetrical horizontal rear lower fork tubes in a clamp shape. One ends of the two rear lower fork tubes are connected together by welding to a bottom bracket tube, and the other ends are provided with through holes for connecting to the corresponding side of the tire axle. Generally, the two rear lower fork tubes should be symmetrical about the vertical plane where the rear tire is located and have a certain opening width to install the tire; when the two rear lower fork tubes are placed horizontally, the end face (also an arc surface) of the rear lower fork tubes welded to the bottom bracket tube should also be closely attached to the arc surface of the bottom bracket tube, and the welding ends of the two rear lower fork tubes are symmetrical; due to deformation during the welding process, therefore, in order to ensure the welding accuracy of the rear lower fork, after the two rear lower fork tubes are welded to the bottom bracket tube, it is necessary to detect the welding quality. In the prior art, after the rear lower fork of the bicycle is manufactured according to certain standards, whether the two rear lower fork tubes are symmetrical can only be judged by the naked eye. The manual detection method makes the measurement of the opening width of the rear lower fork inaccurate, resulting in difficulty in inspecting whether the bicycle rear lower fork meets the specifications, and the detection efficiency is low. Therefore, in view of the above problems, it is necessary to make improvements. Summary of the Utility Model

[0003] The technical problem solved by the utility model: Provide an inspection tool for a bicycle rear fork. By respectively arranging a detection disk and a ranging shaft 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 with respect to the detection disk and the ranging shaft, the problems of low detection accuracy and efficiency of the traditional manual detection method are solved, the difficulty of quality detection of the rear lower fork is reduced, the detection accuracy and efficiency are improved, the factory passing rate is high, the cost is low, the detection range is large, and the use value is high.

[0004] The technical solution adopted by the utility model: An inspection tool for a bicycle rear fork includes a detection disk for detecting the positions of the welding ends of the two rear lower fork tubes of the rear lower fork and the bottom bracket tube. The detection disk is centrally installed at one end of the length-adjustable support device. A ranging shaft for detecting the distance between the tire connection ends of the two rear lower fork tubes of the rear lower fork is centrally fixed at the other end of the length-adjustable support device, and the two rear lower fork tubes are detected by judging the relative positions of the two rear lower fork tubes with respect to the ranging shaft and the detection disk.

[0005] Among them, the length-adjustable support device includes a T-shaped guide rod and an adjustment rod. A guide groove is formed at the bottom of the T-shaped guide rod, and one end of the adjustment rod is adaptively inserted into the guide groove. A plurality of waist-shaped long grooves are evenly distributed along the length direction of the upper end surface of the T-shaped guide rod, and the screws passing through the waist-shaped long grooves are adaptively connected to the threaded holes at the corresponding positions on the adjustment rod, realizing the position-adjustable fixed connection between the T-shaped guide rod and the adjustment rod. The detection disc is centrally installed at the outer end of the adjustment rod, and the distance measuring shaft is centrally installed at the large head end of the T-shaped guide rod.

[0006] Furthermore, an installation groove is formed on the upper end surface of the large head end of the T-shaped guide rod, and the distance measuring shaft located between the tire connection ends of the two rear lower fork tubes is centrally and adaptively positioned in the installation groove. A pressing plate for pressing and fixing the distance measuring shaft in the installation groove is fixed on the upper end surface of the large head end of the T-shaped guide rod.

[0007] Furthermore, the distance measuring shaft adopts a stepped shaft composed of a small-diameter section in the middle and large-diameter sections at both ends. The small-diameter section in the middle of the distance measuring shaft is adapted to the installation groove of the length-adjustable support device, and the stepped surface formed at the transition position between the small-diameter section and the large-diameter section forms an axial positioning structure with the side wall of the large head end of the T-shaped guide rod in the length-adjustable support device. Positioning convex columns for adapting to the through holes at the tire connection ends of the rear lower fork tubes are concentrically arranged on both end faces of the distance measuring shaft.

[0008] Advantages of the present utility model compared with the prior art:

[0009] 1. In this technical solution, by arranging a distance measuring shaft at the large head end of the length-adjustable support device, the distance between the tire connection ends of the two rear lower fork tubes can be quickly detected without manual measurement. By judging whether the positioning convex column at the end of the distance measuring shaft is smoothly matched with the through hole at the corresponding side tire connection end of the rear lower fork tube, the welding quality of the rear lower fork can be determined. The detection is convenient, fast, time-saving and labor-saving;

[0010] 2. In this technical solution, by arranging a detection disc at the small head end of the length-adjustable support device, on the premise that the positioning convex column at the end of the distance measuring shaft 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 welding ends of the two rear lower fork tubes are tangent to the detection disc, it can be determined whether the welding of the two rear lower fork tubes is qualified, eliminating the manual measurement step. The detection is convenient, fast and efficient;

[0011] 3. This technical solution adopts a length-adjustable support device formed by the position-adjustable installation of the T-shaped guide rod and the adjustment rod, providing conditions for adjusting the distance between the detection disc and the distance measuring shaft, so as to meet the detection of rear lower forks of different models and improve the detection range;

[0012] 4. This technical solution solves the problems of low detection accuracy and efficiency of traditional manual detection methods, reduces the difficulty of quality inspection of the rear fork, improves the detection accuracy and efficiency, has a high passing rate at the factory, low cost, a large detection range, and high use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the utility model in use state;

[0014] Figure 2 is a schematic structural diagram of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the Figure 1-2 in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] It should be noted that in this article, without contrary description, it should be understood that: the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In this article, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation. Elements defined by the statement "including one..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements.

[0018] A fixture for the rear fork of a bicycle, such as Figure 1-2As shown in the figure, it includes a detection disk 1 for detecting the welding end positions of the two rear down tube 3 and the bottom bracket tube 4 of the rear down tube. The detection disk 1 is centrally installed at one end of the length adjustable support device 2. A ranging shaft 5 for detecting the distance between the tire connection ends of the two rear down tubes 3 of the rear down tube is centrally fixed at the other end of the length adjustable support device 2. The two rear down tubes 3 are detected by judging the relative positions of the two rear down tubes 3, the ranging shaft 5 and the detection disk 1. In the above structure, by setting the ranging shaft 5 at the large end of the length adjustable support device 2, the distance between the tire connection ends of the two rear down tubes 3 can be quickly detected without manual measurement. By judging whether the positioning convex column 6 at the end of the ranging shaft 5 can be smoothly matched with the through hole at the tire connection end of the corresponding rear down tube 3, the welding quality of the rear down tube can be determined. The detection is convenient and fast, saving time and effort. By setting the detection disk 1 at the small end of the length adjustable support device 2, on the premise that the positioning convex column 6 at the end of the ranging shaft 5 is adapted to the through hole at the tire connection end of the rear down tube 3, by observing whether the inner side walls of the welding ends of the two rear down tubes 3 are tangent to the detection disk 1, it can be determined whether the welding of the two rear down tubes is qualified, eliminating the manual measurement step. The detection is convenient, fast and efficient. It solves the problems of low detection accuracy and efficiency of the traditional manual detection method, reduces the difficulty of rear down tube quality detection, improves the detection accuracy and efficiency, has a high factory pass rate, low cost, large detection range and high use value.

[0019] The specific structure of the length adjustable support device 2 is as follows: The length adjustable support device 2 includes a T-shaped guide rod 2-1 and an adjusting rod 2-2. A guide groove is formed at the bottom of the T-shaped guide rod 2-1, and one end of the adjusting rod 2-2 is adaptively inserted into the guide groove. A plurality of waist-shaped long grooves 2-3 are evenly distributed along the length direction of the upper end surface of the T-shaped guide rod 2-1, and the screw 2-4 passing through the waist-shaped long grooves 2-3 is adaptively connected to the threaded hole 2-5 at the corresponding position on the adjusting rod 2-2, realizing the position adjustable fixed connection between the T-shaped guide rod 2-1 and the adjusting rod 2-2. The detection disk 1 is centrally installed at the outer end of the adjusting rod 2-2, and the ranging shaft 5 is centrally installed at the large end of the T-shaped guide rod 2-1. Specifically, an installation groove 2-6 is formed on the upper end surface of the large end of the T-shaped guide rod 2-1, and the ranging shaft 5 located between the tire connection ends of the two rear down tubes 3 is centrally and adaptively positioned in the installation groove 2-6. A pressing plate 2-7 for pressing and fixing the ranging shaft 5 in the installation groove 2-6 is fixed on the upper end surface of the large end of the T-shaped guide rod 2-1. In the above structure, the length adjustable support device 2 formed by the position adjustable installation of the T-shaped guide rod 2-1 and the adjusting rod 2-2 provides conditions for the adjustment of the distance between the detection disk 1 and the ranging shaft 5, so as to meet the detection of rear down tubes of different models and improve the detection range.

[0020] Among them, the specific structure of the ranging shaft 5 is as follows: the ranging shaft 5 adopts a stepped shaft composed of a small diameter section in the middle and large diameter sections at both ends. The small diameter section in the middle of the ranging shaft 5 is adapted to the mounting groove 2-6 of the length-adjustable support device 2, and the stepped surface formed at the transition position between the small diameter section and the large diameter section forms an axial positioning structure with the side wall of the large head end of the T-shaped guide rod 2-1 in the length-adjustable support device 2. Both end surfaces of the ranging shaft 5 are concentrically provided with positioning bosses 6 for adapting to the through holes at the tire connecting ends of the rear lower fork tube 3.

[0021] When in use, the length-adjustable support device 2 is adjusted to the corresponding length according to the model of the rear chain fork, and the distance measuring shaft 5 of the corresponding model is installed into the large end of the T-shaped guide rod 2-1, and then the present structure is placed between the two rear chain fork tubes 3 of the rear chain fork, so that the positioning boss 6 at the end of the distance measuring shaft 5 is adapted to the through hole of the tire connecting end of the rear chain fork tube 3 on the same side. At this time, if the end face of the large-diameter section of the distance measuring shaft 5 contacts the side wall of the tire connecting end of the rear chain fork tube 3, the required distance between the tire connecting ends of the two rear chain fork tubes 3 meets the requirement, otherwise it does not meet the requirement; since the distance measuring shaft 5 is centrally fixed on the T-shaped guide rod 2-1, the detection disk 1 is located on the radial center line of the distance measuring shaft 5. Therefore, at this time, it is only necessary to determine whether the inner side walls of the two rear chain fork tubes 3 are tangent to the detection disk 1 to determine whether the welding end of the rear chain fork tube 3 meets the requirement, that is, if both rear chain fork tubes 3 are tangent to the detection disk 1, then the two rear chain fork tubes 3 meet the welding requirements, otherwise it does not meet the welding requirements.

[0022] 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.

[0023] 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 bicycle rear fork inspection tool, characterized in that: The invention comprises a detection plate (1) for detecting the position of the welding ends of two rear fork tubes (3) and a bottom bracket tube (4) of a rear fork, wherein the detection plate (1) is centrally mounted on one end of a length-adjustable support device (2), and a distance measuring shaft (5) for detecting the distance between the tire connection ends of the two rear fork tubes (3) of the rear fork is centrally fixed on the other end of the length-adjustable support device (2), and the two rear fork tubes (3) are detected by judging the relative positions of the two rear fork tubes (3), the distance measuring shaft (5) and the detection plate (1).

2. The bicycle rear fork inspection tool according to claim 1, 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 disk (1) is centrally mounted on the outer end of the adjustment rod (2-2), and the distance measuring shaft (5) is centrally mounted on the large end of the T-shaped guide rod (2-1).

3. The bicycle rear fork inspection tool according to claim 2, characterized in that: The upper end surface of the large end of the T-shaped guide rod (2-1) is provided with a mounting groove (2-6), and the distance measuring shaft (5) located between the tire connection ends of the two rear lower fork tubes (3) is centrally adapted and positioned in the mounting groove (2-6), and the upper end surface of the large end of the T-shaped guide rod (2-1) is fixed with a pressing plate (2-7) for pressing and fixing the distance measuring shaft (5) in the mounting groove (2-6).

4. The bicycle rear fork inspection tool according to any one of claims 1 to 3, characterized in that: The distance measuring shaft (5) is a stepped shaft composed of a small diameter section in the middle and large diameter sections at both ends. The small diameter section in the middle of the distance measuring shaft (5) is adapted to fit in a mounting groove (2-6) of the length-adjustable support device (2), and a stepped surface formed at a transition position between the small diameter section and the large diameter section forms an axial positioning structure with a side wall of a large end of a T-shaped guide rod (2-1) in the length-adjustable support device (2). Both end surfaces of the distance measuring shaft (5) are concentrically provided with positioning bosses (6) adapted to fit with through holes at the tire connection end of a rear lower fork tube (3).

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