A bolt and nut acceptance fixture

Abstract

This utility model provides a bolt and nut acceptance fixture, comprising: a bolt measuring structure including several circular holes of different specifications formed on the surface of a base, the inner diameter of each circular hole being set according to different bolt outer diameter specifications in the standard; a bolt head / nut measuring structure including several regular polygonal holes of different specifications formed on the surface of the base, the specifications of the regular polygonal holes being set according to different bolt head / nut outer contour specifications in the standard; an internal polygonal bolt head measuring structure including several regular polygonal posts of different specifications formed on the surface of the base, the specifications of the regular polygonal posts being set according to different internal polygonal bolt head inner hole specifications in the standard; and a bolt length measuring structure including a V-groove set on the surface of the base, the V-groove having graduations along the length direction. This bolt and nut acceptance fixture has the advantages of being easy to carry, improving acceptance efficiency, and facilitating parts management.

Description

Technical Field

[0001] This utility model relates to the field of parts acceptance management technology, specifically, to a bolt and nut acceptance fixture. Background Technology

[0002] When repairing electric buses, it is necessary to purchase bolts of various specifications and lengths. For acceptance personnel who are not familiar with the specifications of fasteners, it is necessary to manually measure them with the help of centering tools such as vernier calipers and steel rulers in order to determine the key parameters of the fasteners and then classify and organize them.

[0003] Currently, most known equipment for parameter testing of bolts and nuts is used in the manufacturing process to check whether the produced bolts and nuts match the production indicators. It is a product developed based on the requirement of qualified testing. Such products have high professionalism and precision, but are also more complex and not suitable for application in the procurement and classification process.

[0004] Based on the above requirements, a simple tooling needs to be designed that is lightweight and easy to use, enabling rapid inspection of the specifications of purchased bolts and nuts, so as to realize the acceptance and classification of purchased parts.

[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by providing a bolt and nut acceptance fixture that is easy to carry, improves acceptance efficiency, and facilitates parts management.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a bolt and nut acceptance fixture, including a base and a screw measuring structure, a bolt head / nut measuring structure, an internal polygonal bolt head measuring structure, and a bolt length measuring structure, all based on the base;

[0008] The screw measuring structure includes several circular holes of different specifications formed on the surface of the base, and the inner diameter of each circular hole is set according to different screw outer diameter specifications in the standard.

[0009] The bolt head / nut measuring structure includes several regular polygonal holes of different specifications formed on the base surface. The specifications of the regular polygonal holes are set according to the outer contour specifications of different bolt heads / nuts in the standard.

[0010] The internal polygonal bolt head measuring structure includes several regular polygonal columns of different specifications formed on the base surface. The specifications of the regular polygonal columns are set according to the inner hole specifications of different internal polygonal bolt heads in the standard.

[0011] The bolt length measuring structure includes a V-shaped groove on the surface of the base, and the V-shaped groove has graduations along the length direction.

[0012] Based on the above, in the circular hole and polygonal hole of the same specification, the circular hole is set inside the polygonal hole.

[0013] Based on the above, the circular holes and polygonal holes of the same specification are arranged concentrically.

[0014] Based on the above, the circular holes and polygonal holes are arranged in an array according to their specified sizes within a region of the upper surface of the base.

[0015] Based on the above, the plurality of polygonal columns are arranged in an array according to their specified sizes in another area on the upper surface of the base.

[0016] As described above, the V-shaped groove is located at the edge of the base.

[0017] Based on the above, one end of the V-shaped groove extends to the edge of the base to form a notch, and the notch position serves as the zero point of the scale.

[0018] Based on the above, the base is marked with corresponding screw measuring structures, bolt head / nut measuring structures, and internal polygonal bolt head measuring structures.

[0019] Based on the above, the base is a hollow structure made of 3D printing material.

[0020] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model is an integrated tooling with multiple bolt and nut specifications for measurement. It can quickly test different specifications of purchased parts to determine the specific specifications of the bolts and nuts to be tested, so that purchasing personnel can understand whether the purchased parts are compliant, and quickly classify and organize them for warehousing.

[0021] Because of its lightweight and compact structure, this tooling can be placed in the warehouse, facilitating the management of procurement and warehousing. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the bolt and nut acceptance fixture in this utility model.

[0023] Figure 2 This is a three-dimensional structural diagram of the bolt and nut acceptance fixture in this utility model.

[0024] In the diagram: 1. Base; 2. Screw measuring structure; 3. Bolt head / nut measuring structure; 4. Internal polygonal bolt head measuring structure; 5. Bolt length measuring structure; 6. Scale. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0026] like Figure 1 and Figure 2 As shown, a bolt and nut acceptance fixture includes a base 1 and a bolt measuring structure 2, a bolt head / nut measuring structure 3, an internal polygonal bolt head measuring structure 4, and a bolt length measuring structure 5, all based on the base 1.

[0027] In this embodiment, the base 1 and the tooling are manufactured using 3D printing technology. The base 1 is made of 3D printing material and has a hollow internal structure to reduce weight.

[0028] The screw measuring structure 2 includes several circular holes of different specifications formed on the surface of the base. The inner diameter of each circular hole is set according to the different screw outer diameter specifications in the standard. As shown in the figure, circular holes of screw outer dimensions of M3-M36 specifications are formed. The size of the circular holes is equal to the outer diameter of the screw of that specification. They are concentrated in the upper left corner area of ​​the base 1 and are marked. When in use, the operator inserts the end of the screw to be tested into the corresponding circular hole. If the shape and outline match, it means that the screw to be tested is compliant and the specific specification of the screw to be tested can be determined.

[0029] The bolt head / nut measuring structure 3 includes several regular polygonal holes of different specifications formed on the surface of the base 1. The specifications of the regular polygonal holes are set according to the outer contour specifications of different bolt heads / nuts in the standard, which is the same as the principle of the screw measuring structure 2. The regular polygonal holes are holes that can be adapted to bolt heads and nuts of different specifications. In this embodiment, they are set as polygonal holes with the outer dimensions of bolt heads / nuts of M3-M36 specifications.

[0030] To improve integration, in this embodiment, circular holes and polygonal holes are nested according to specifications. That is, under the same specifications, the circular holes are set inside the polygonal holes. The circular holes and polygonal holes are concentrically arranged to improve space utilization efficiency and facilitate inspection by inspectors, thereby improving inspection efficiency.

[0031] The internal polygonal bolt head measuring structure 4 includes several regular polygonal columns of different specifications formed on the surface of the base. The specifications of the regular polygonal columns are set according to the inner hole specifications of different internal polygonal bolt heads in the standard. In this embodiment, the internal polygonal bolt head measuring structure 4 is concentrated in the lower left corner area of ​​the base 1 and arranged in a row, with specifications ranging from M3 to M12.

[0032] During use, the staff holds the hex socket head cap screw head to be tested and matches the hex socket hole with each column. If they match, it means that the parameters of the two are consistent, and the specifications of the hex socket head cap screw head to be tested are determined.

[0033] The bolt length measuring structure 5 includes a V-shaped groove on the surface of the base 1. The V-shaped groove has a scale 6 along its length. Specifically, in this embodiment, the V-shaped groove is located at the edge of the base 1. When designing the specific structure, one end of the V-shaped groove extends to the edge of the base to form a notch. The notch position serves as the zero point of the scale. The scale is in increments of 5 mm, and the maximum value of the scale is 200 mm.

[0034] When using the bolt, place the entire bolt into the V-groove, with the bolt head area positioned at the notch. Measure the length of the bolt thread. This measured length is the same as the bolt length specified in the standard. By reading the bolt's length dimension, the bolt's length data can be obtained, thus enabling the determination of the bolt's specifications.

[0035] In other embodiments, there may be some non-hexagonal bolt heads / nuts and internal angle bolts, etc., and the tool can be adapted to be a set of tools specifically for such non-hexagonal structures.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A bolt and nut acceptance fixture, characterized in that: It includes a base and a screw measuring structure, a bolt head / nut measuring structure, an internal polygonal bolt head measuring structure, and a bolt length measuring structure, all based on the base; The screw measuring structure includes several circular holes of different specifications formed on the surface of the base, and the inner diameter of each circular hole is set according to different screw outer diameter specifications in the standard. The bolt head / nut measuring structure includes several regular polygonal holes of different specifications formed on the base surface. The specifications of the regular polygonal holes are set according to the outer contour specifications of different bolt heads / nuts in the standard. The internal polygonal bolt head measuring structure includes several regular polygonal columns of different specifications formed on the base surface. The specifications of the regular polygonal columns are set according to the inner hole specifications of different internal polygonal bolt heads in the standard. The bolt length measuring structure includes a V-shaped groove on the base surface, the V-shaped groove having graduations along the length direction; for the circular and polygonal holes of the same specification, the circular hole is located inside the polygonal hole; for the circular and polygonal holes of the same specification, the circular hole and the polygonal hole are concentrically arranged. The circular holes and polygonal holes are arranged in an array according to the specified size in one area of ​​the upper surface of the base; the multiple polygonal columns are arranged in an array according to the specified size in another area of ​​the upper surface of the base; the V-shaped groove is provided at the edge of the base; one end of the V-shaped groove extends to the edge of the base to form a notch, and the notch position serves as the zero point of the scale.

2. The bolt and nut acceptance fixture according to claim 1, characterized in that: The base is marked with corresponding screw measuring structures, bolt head / nut measuring structures, and internal polygonal bolt head measuring structures.

3. The bolt and nut acceptance fixture according to claim 1, characterized in that: The base is a hollow structure made of 3D printing material.

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