Auxiliary measuring tool for solid shaft head
By designing a solid shaft head auxiliary measuring tool and utilizing the positioning structure of the upper sleeve, lower sleeve, and clamping sleeve, the problem of perpendicularity between the micrometer measuring surface and the solid shaft head surface was solved, achieving high-precision measurement results.
Patent Information
- Application Number
- CN202423256626.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-29
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-29
AI Technical Summary
In existing technologies, micrometers cannot guarantee that the measuring surface is completely perpendicular to the surface being measured by the solid shaft head, which leads to deviations in measurement results and affects accuracy and reliability.
A solid shaft head auxiliary measuring tool was designed, including an upper sleeve, a lower sleeve, and a clamping sleeve. The micrometer is ensured to be perpendicular to the surface being measured by the positioning through hole and positioning groove, and a positioning bead and spring are used to achieve a tight fit to avoid tilting gaps.
Ensure that the micrometer measuring head is perpendicular to the centerline of the solid spindle head to improve measurement accuracy, avoid affecting the measurement values due to different positions, and ensure coaxiality.
Smart Images
Figure CN223538253U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of solid shaft head measuring tools, and in particular to an auxiliary measuring tool for solid shaft heads. Background Technology
[0002] Currently, in precision testing, to ensure product quality and specifications meet standards, a micrometer, a high-precision measuring tool, is typically used to measure the diameter of the shoulder at the connection between the threaded and smooth sections of a solid shaft end. The micrometer, with its fine scale and reliable measuring performance, plays a crucial role in precision manufacturing and quality control. However, despite its many advantages, the micrometer often faces a challenging problem in actual measurement: ensuring that the measuring facet of the micrometer is perfectly perpendicular to the surface of the solid shaft end being measured.
[0003] This challenge stems primarily from a variety of factors, including the geometry of the solid micrometer head, limitations of the measurement environment, and the skill level of the operator. Therefore, in practice, it is difficult to accurately determine whether the micrometer is perfectly perpendicular to the surface being measured, relying solely on visual inspection or touch. Even a slight angular deviation between the micrometer's measuring face and the surface can lead to inaccurate measurement results, thus affecting the accuracy and reliability of the entire measurement process. Summary of the Invention
[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing an auxiliary measuring tool for solid shaft heads, thereby achieving the goal of accurately measuring the diameter of solid shaft heads.
[0005] This utility model provides a solid shaft head auxiliary measuring tool, characterized in that: it includes a measuring tool and a clamping sleeve; the measuring tool includes an upper sleeve and a lower sleeve, with the lower end of the upper sleeve connected to the upper end of the lower sleeve; the upper sleeve has a first positioning through hole at its axis, corresponding to the small-diameter threaded shaft portion at the upper end of the solid shaft head; the lower sleeve has a second positioning through hole at its axis, corresponding to the large-diameter optical shaft portion at the lower end of the solid shaft head; the first positioning through hole and the second positioning through hole are connected and arranged coaxially; the lower sleeve has symmetrically distributed positioning grooves at both ends, with the two ends and outer sides of the positioning grooves having an open structure; the positioning grooves are connected to the second positioning through hole, with a portion of the two ends of the second positioning through hole exposed and connected to the outside; the bottom surface of the positioning groove is a positioning surface for positioning the side of the micrometer.
[0006] Furthermore, the upper sleeve and the lower sleeve are arranged coaxially, and the diameter of the upper sleeve is smaller than the diameter of the lower sleeve.
[0007] Furthermore, the bottom surface of the positioning groove is a stepped surface, the upper end of the stepped surface is the positioning surface, and the lower end is used to place the micrometer.
[0008] Furthermore, the clamping sleeve is provided with a stepped guide through hole, the upper end of which is a small diameter hole and the lower end of which is a large diameter hole. The small diameter hole of the clamping sleeve is a threaded hole, which is threadedly engaged with the upper small diameter threaded shaft portion of the solid shaft head. The large diameter hole of the clamping sleeve is fitted onto the outside of the upper sleeve.
[0009] Furthermore, the top wall of the large-diameter hole of the clamping sleeve is provided with multiple guide blind holes. A spring and a positioning bead are installed in the guide blind holes. The upper end of the spring is connected to the top wall of the guide blind hole, and the lower end is connected to the positioning bead. The positioning bead rests on the upper end surface of the upper sleeve.
[0010] Compared with the prior art, the present invention has the following outstanding advantages:
[0011] When using this invention for measurement, it can be ensured that the measuring head of the micrometer is perpendicular to the center line of the solid shaft head, and the measurement value is not affected by the different positions of the measuring point, thus ensuring the accuracy of the measurement value.
[0012] The clamping sleeve of this invention can tightly fit the upper end face of the second positioning hole of the measuring tool with the shoulder of the solid shaft head through the positioning bead, so as to avoid the occurrence of tilted gaps when the measuring tool and the solid shaft head are mated, thereby affecting the coaxiality. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is the front view of this utility model;
[0015] Figure 3 yes Figure 2 A sectional view of section AA;
[0016] Figure 4 This is a schematic diagram of the structure of this utility model in conjunction with a solid shaft head;
[0017] Among them, 1. Measuring tool; 11. Upper sleeve; 12. Lower sleeve; 13. Positioning groove; 14. Positioning surface; 2. Clamping sleeve; 21. Positioning bead. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0019] like Figure 1 and 2 As shown, this utility model includes a measuring tool 1 and a clamping sleeve 2.
[0020] The measuring tool 1 includes an upper sleeve 11 and a lower sleeve 12. The lower end of the upper sleeve 11 is fixedly connected to the upper end of the lower sleeve 12. The upper sleeve 11 and the lower sleeve 12 are arranged coaxially, and the diameter of the upper sleeve 11 is smaller than the diameter of the lower sleeve 12.
[0021] The upper sleeve 11 is provided with a first positioning through hole at the axis position, which corresponds to the small diameter threaded shaft part at the upper end of the solid shaft head. The lower sleeve 12 is provided with a second positioning through hole at the axis position, which corresponds to the large diameter optical shaft part at the lower end of the solid shaft head. The first positioning through hole and the second positioning through hole are connected and arranged on the same axis.
[0022] The lower sleeve 12 is provided with symmetrically distributed positioning grooves 13 at both ends. The two ends and the outer side of the positioning grooves 13 are open structures. The positioning grooves 13 are connected to the second positioning through hole, so that the two ends of the second positioning through hole are exposed and connected to the outside.
[0023] The bottom surface of the positioning groove 13 is the positioning surface 14, which is used to position the side of the micrometer. In the optimized solution, the bottom surface of the positioning groove 13 is a stepped surface, the upper end of the stepped surface is the positioning surface 14, and the lower end is used to place the micrometer.
[0024] like Figure 3 and 4 As shown, the clamping sleeve 2 is provided with a stepped guide through hole. The upper end of the stepped guide through hole is a small diameter hole, and the lower end is a large diameter hole. The small diameter hole of the clamping sleeve 2 is a threaded hole. The small diameter threaded hole is threadedly engaged with the small diameter threaded shaft part at the upper end of the solid shaft head. The large diameter hole of the clamping sleeve 2 is fitted on the outside of the upper sleeve 11.
[0025] The top wall of the large-diameter hole of the clamping sleeve 2 is provided with multiple guide blind holes. A spring and a positioning bead 21 are installed in the guide blind holes. The upper end of the spring is connected to the top wall of the guide blind hole, and the lower end is connected to the positioning bead 21. The positioning bead 21 rests on the upper end surface of the upper sleeve 11.
[0026] The operation process is as follows: When using this utility model, the measuring tool 1 is fitted onto the solid shaft head, so that the upper end face of the second positioning through hole is placed at the shoulder of the threaded part and the smooth shaft part at the upper end of the solid shaft head. The threaded part of the solid shaft head passes through the first positioning through hole of the upper sleeve 11. The small diameter threaded through hole of the clamping sleeve 2 is threadedly engaged with the threaded part of the solid shaft head. By rotating the compression cylinder, the positioning bead 21 tightly fits the upper end face of the second positioning hole with the shoulder. At this time, the outer side of the shoulder of the solid shaft head is exposed through the positioning groove 13 and the second positioning through hole. The two measuring heads of the micrometer are placed on the positioning surface 14 of the positioning groove 13 to measure the diameter at the shoulder of the hollow shaft head.
[0027] It should be noted that the specific embodiments of this utility model have been described in detail. For those skilled in the art, all obvious changes made to it without departing from the spirit and scope of this utility model are within the protection scope of this utility model.
Claims
1. A solid shaft head auxiliary measuring tool (1), characterized in that: The device includes a measuring tool (1) and a clamping sleeve (2). The measuring tool (1) includes an upper sleeve (11) and a lower sleeve (12). The lower end of the upper sleeve (11) is connected to the upper end of the lower sleeve (12). The upper sleeve (11) has a first positioning through hole at its axis, which corresponds to the small-diameter threaded shaft portion at the upper end of the solid shaft head. The lower sleeve (12) has a second positioning through hole at its axis, which corresponds to the large-diameter optical shaft portion at the lower end of the solid shaft head. The first positioning through hole and the second positioning through hole are connected and arranged along the same axis. The lower sleeve (12) has symmetrically distributed positioning grooves (13) at both ends. The two ends and the outer side of the positioning grooves (13) are open structures. The positioning grooves (13) are connected to the second positioning through hole. The two ends of the second positioning through hole are exposed and connected to the outside. The bottom surface of the positioning groove (13) is a positioning surface (14) for positioning the side of the micrometer.
2. The solid shaft head auxiliary measuring tool (1) according to claim 1, characterized in that: The upper sleeve (11) and the lower sleeve (12) are arranged coaxially, and the diameter of the upper sleeve (11) is smaller than the diameter of the lower sleeve (12).
3. The solid shaft head auxiliary measuring tool (1) according to claim 1, characterized in that: The bottom surface of the positioning groove (13) is a stepped surface, the upper end of the stepped surface is the positioning surface (14), and the lower end is used to place the micrometer.
4. The solid shaft head auxiliary measuring tool (1) according to claim 1, characterized in that: The clamping sleeve (2) is provided with a stepped guide through hole. The upper hole of the stepped guide through hole is a small diameter hole and the lower hole is a large diameter hole. The small diameter hole of the clamping sleeve (2) is a threaded hole. The small diameter threaded hole is threadedly engaged with the small diameter threaded shaft part at the upper end of the solid shaft head. The large diameter hole of the clamping sleeve (2) is fitted on the outside of the upper sleeve (11).
5. The solid shaft head auxiliary measuring tool (1) according to claim 4, characterized in that: The top wall of the large-diameter hole of the clamping sleeve (2) is provided with multiple guide blind holes. A spring and a positioning bead (21) are installed in the guide blind hole. The upper end of the spring is connected to the top wall of the guide blind hole, and the lower end is connected to the positioning bead (21). The positioning bead (21) rests on the upper end surface of the upper sleeve (11).