A mechanism for detecting an inner annular groove

Abstract

A mechanism for detecting inner annular groove, including support seat, dial gauge and measuring component, measuring component is constituted by fixed amount lever and movable amount lever which cross each other in X type, both are hinged to support seat side surface through shaft position screw at intersection point; in front section of intersection point, front end of fixed amount lever and movable amount lever protrude to support seat outside and abut with inner wall of inner annular groove; in rear section of intersection point, fixed amount lever is located below rear section of movable amount lever; spring is arranged between rear end of movable amount lever and intersection point and forms elastic connection with support seat side surface above; measuring head of dial gauge is vertically downward and abuts with lever body surface between hanging buckle point and rear end of movable amount lever. The utility model discloses a measuring component is set to the structure of X type measuring lever, and the size detection of inner annular groove is transferred outward, and at the same time, the small displacement of movable amount lever is amplified and displayed on dial gauge by using lever principle, and the measuring result can be obtained conveniently and accurately.

Description

Technical Field

[0001] This utility model pertains to a testing mechanism, specifically a mechanism for testing inner annular grooves. Background Technology

[0002] In the field of machining, measuring tools, as core equipment for quality control, have undergone technological evolution that has always kept pace with the demands of precision manufacturing. Currently, the industry commonly uses two types of inspection solutions: general-purpose measuring tools and special-purpose measuring tools. General-purpose measuring tools have limitations in adaptability and struggle to meet the measurement requirements of complex annular groove structures. While special-purpose measuring tools can achieve targeted measurements, their customized development cycle is long and their customization costs are high.

[0003] For parts with internal annular grooves, traditional measurement methods are not suitable due to the spatial geometry of the grooves. If the groove is deep, measuring tools cannot easily reach the measurement location. If the internal annular groove has a stepped inner diameter, rapid measurement is difficult. Using specialized measuring tools is not economical for small-batch, multi-variety parts with internal annular grooves. Summary of the Invention

[0004] In view of this, the present invention provides a mechanism for detecting an inner annular groove, which shifts the detection of the inner annular groove size outward, making it easier to obtain measurement results.

[0005] The technical solution adopted by this utility model is: a mechanism for detecting an inner annular groove, including a support base, a dial indicator, and a measuring component, characterized in that: the measuring component consists of a fixed measuring rod and a movable measuring rod that intersect each other in an X-shape, and the two are hinged to the side of the support base at the intersection point by a axial screw, forming a lever structure that can rotate relative to each other in a vertical plane; at the front end of the intersection point, the front ends of the fixed measuring rod and the movable measuring rod extend outward from the support base, and the extended ends respectively form measuring ends that bend symmetrically to both sides, and the two measuring ends respectively abut against the inner wall of the inner annular groove; towards the support... The total width of the fixed and movable measuring rods extending outward from the support is less than the width of the inner annular groove opening, and the length is greater than the depth of the inner annular groove. At the rear section of the intersection, the fixed measuring rod is located below the rear section of the movable measuring rod. The rear end of the fixed measuring rod is rigidly fixed to the side of the support by a fixing screw. A hook point is provided between the rear end of the movable measuring rod and the intersection, and the hook point is elastically connected to the upper side wall of the support by a spring. The dial indicator is fixed to the side of the support by a gauge holder, and the probe of the dial indicator is vertically downward abutting against the surface of the rod body between the hook point and the rear end of the movable measuring rod.

[0006] Furthermore, the fixed measuring rod is a bent rod consisting of three sections. The first section is in a horizontal position and extends out of the side of the support base. The second section is inclined to connect the first section and the third section. The third section is fixed to the side of the support base and is positioned lower than the first section. The measuring end is located at the front end of the first section, the intersection is located at the transition connection between the first and second sections, and the fixing screw is located at the rear end of the third section.

[0007] Furthermore, the measuring end is in point contact with the inner wall of the inner annular groove.

[0008] Furthermore, the measuring end is a hook with an inner vertical shape and an outer angle of 60 degrees.

[0009] Furthermore, the rear end of the movable lever is provided with an opening adjustment mechanism.

[0010] Furthermore, the opening adjustment mechanism includes a pressure plate and an adjusting screw. The pressure plate is horizontally fixed on the support base and extends out of the side of the support base. The extended part is located above the movable measuring foot and has a vertically penetrating threaded hole. The adjusting screw is screwed into the threaded hole, and the lower end of the adjusting screw contacts the movable measuring rod body. The contact point is located between the position indicated by the dial indicator probe and the rear end of the movable measuring rod.

[0011] The beneficial effects of this utility model are: by setting the measuring component to an X-shaped measuring rod structure, the size detection of the inner annular groove is shifted outward, and the small displacement of the movable measuring rod is amplified and displayed on the dial indicator by utilizing the lever principle, so that the measurement results can be obtained conveniently and accurately. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a left view of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the fixed measuring rod in this utility model;

[0015] Figure 4 yes Figure 3 A partial schematic diagram of the K-direction;

[0016] Figure 5 This is a schematic diagram of the movable measuring rod in this utility model;

[0017] Figure 6 yes Figure 5 N-direction local schematic diagram;

[0018] In the diagram: 1. Support base, 2. Side view, 3. Fixed measuring rod, 3-1. First section of rod, 3-2. Second section of rod, 3-3. Third section of rod, 4. Movable measuring rod, 5. Measuring end, 6. Shaft screw, 7. Hook point, 8. Spring, 9. Dial indicator, 10. Indicator holder, 11. Pressure plate, 12. Adjusting screw, 13. Fixing screw, 14. Calibration ring gauge, 15. Intersection point, 16. Hook screw, 17. Fixed spring hook. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-6 As shown, a mechanism for detecting an inner annular groove includes a support base 1, a dial indicator 9, and a measuring component. The support base 1 serves to fix the measuring component and the dial indicator 9. The measuring component is mounted on the vertical side 2 of the support base 1. The dial indicator 9, via a holder 10, abuts its probe against the measuring component to read the measured value of the measuring component.

[0021] In this invention, the design of the measuring component is the core technical solution. The measuring component includes a fixed measuring rod 3 and a movable measuring rod 4. The fixed measuring rod 3 and the movable measuring rod 4 intersect each other in an X-shape, and are hinged to the side 2 of the support base 1 at the intersection point 15 by a pivot screw 6, forming a lever structure that can rotate relative to each other in a vertical plane.

[0022] At the front end of intersection 15, the front ends of the fixed measuring rod 3 and the movable measuring rod 4 extend outward along the side 2 of the support base 1, and the front ends of the fixed measuring rod 3 and the movable measuring rod 4 are respectively provided with measuring ends 5 that are symmetrically bent to both sides. The two measuring ends 5 can extend into the inner annular groove and abut against the inner wall, with the abutment positions located at both ends of the same circumferential diameter of the inner annular groove. To facilitate the measurement of the inner annular groove by the fixed measuring rod 3 and the movable measuring rod 4, the measuring ends 5 are in point contact with the inner wall of the inner annular groove. The measuring ends 5 are configured as hook structures, with the inner side of the hook being vertical and the outer side inclined at 60 degrees.

[0023] The total width of the fixed measuring rod 3 and the movable measuring rod 4 at the front of intersection 15 is less than the width of the opening of the inner annular groove. The length of the fixed measuring rod 3 and the movable measuring rod 4 extending out of the side 2 of the support seat 1 is greater than the depth of the inner annular groove.

[0024] At the rear end of intersection 15, the fixed measuring rod 3 is located below the rear end of the movable measuring rod 4, facilitating measurement of the movable measuring rod 4 by the dial indicator 9. The rear end of the fixed measuring rod 3 is rigidly fixed to the side 2 of the support base 1 by a fixing screw 13, meaning the fixed measuring rod 3 is fixed in position on the support base 1 and will not rotate. The rear end of the movable measuring rod 4 is a free end, allowing it to rotate vertically around the axis screw 6 at intersection 15. A hook point 7 is provided between the rear end of the movable measuring rod 4 and intersection 15, with a hook screw 16 on this hook point 7. A fixed spring hook 17 is provided on the side 2 of the support base 1 above the hook screw 16, and a spring 8 connects the hook screw 16 and the fixed spring hook 17. The movable measuring rod 4 obtains a rebound force through the spring 8, which is used to lift the movable measuring rod 4 to ensure that the measuring end 5 at the front end of the movable measuring rod 4 can contact the inner wall of the inner annular groove. The dial indicator 9 is fixed to the side 2 of the support base 1 by the indicator frame 10. The probe of the dial indicator 9 is vertically downward and abuts against the rod surface between the hook point 7 of the movable measuring rod 4 and the rear end.

[0025] Example 1

[0026] like Figure 3 and Figure 4 As shown, the fixed measuring rod 3 is a bent rod consisting of three sections. The first section 3-1 is horizontal. The second section 3-2 connects the first section 3-1 and the third section 3-3 at an angle. The third section 3-3 is positioned lower than the first section 3-1 on the side 2 of the support base 1. In other words, there is a height difference between the first and third sections 3-1. The measuring end 5 is located at the front end of the first section 3-1. The intersection 15 is located at the connection between the first and second sections 3-1. The fixing screw 13 is located at the rear end of the third section 3-3 and rigidly connected to the side 2 of the support base 1. This arrangement ensures sufficient space for movement between the rear ends of the fixed measuring rod 3 and the movable measuring rod 4.

[0027] Example 2

[0028] like Figure 5 and Figure 6 As shown, the movable measuring rod 4 is a straight rod. A recessed step is provided at the rear end of the movable measuring rod 4 at the hook point 7. This step corresponds to the position indicated by the probe of the dial indicator 9, serving a positioning function.

[0029] To limit the size of the opening of the measuring component, an opening adjustment mechanism is provided at the rear end of the movable measuring rod 4. For example... Figure 1 and Figure 2As shown, the opening adjustment mechanism includes a pressure plate 11 and an adjusting screw 12. The pressure plate 11 is horizontally fixed on the support base 1, extending beyond the side 2 of the support base 1, with the extended portion positioned above the movable measuring foot and having a vertically penetrating threaded hole. The adjusting screw 12 is screwed into the threaded hole, with its lower end contacting the body of the movable measuring rod 4. The contact point is located between the position indicated by the dial indicator 9 and the rear end of the movable measuring rod 4. The position of the lower end of the adjusting screw 12 represents the maximum upward rotation position of the movable measuring rod 4.

[0030] In use, the rear end of the movable measuring rod 4 is pressed down, sending the measuring ends 5 of both the movable measuring rod 4 and the fixed measuring rod 3 into the inner annular groove of the calibration ring gauge 14. Releasing the rear end of the movable measuring rod 4 causes it to rotate relative to the fixed measuring rod 3 under the action of the spring 8, causing the two measuring ends 5 to abut against the inner wall of the inner annular groove. At this point, the dial indicator 9 is read to obtain the standard dimension. The inner annular groove of the part to be tested is then measured using the same method to obtain the actual dimension, thereby determining whether the dimension of the inner annular groove of the part meets the production tolerance requirements. The entire testing device has a simple structure, low manufacturing cost, stable and convenient testing process, and can quickly obtain test results. It can also be used to measure parts with deep groove structures or stepped inner annular grooves.

Claims

1. A mechanism for detecting an inner annular groove, comprising a support base (1), a dial indicator (9), and a measuring component, characterized in that: The measuring component consists of a fixed measuring rod (3) and a movable measuring rod (4) that intersect each other in an X-shape. The two are hinged to the side (2) of the support base (1) at the intersection (15) by a shaft screw (6), forming a lever structure that can rotate relative to each other in a vertical plane. At the front end of the intersection (15), the front ends of the fixed measuring rod (3) and the movable measuring rod (4) extend outward to the side (2) of the support base (1), and the extended ends form measuring ends (5) that are symmetrically bent to both sides. The two measuring ends (5) abut against the inner wall of the inner annular groove. The total width of the rod body of the fixed measuring rod (3) and the movable measuring rod (4) extending outward to the side (2) of the support base (1) is smaller than the opening of the inner annular groove. The width and length are greater than the depth of the inner annular groove; at the rear section of the intersection (15), the fixed measuring rod (3) is located below the rear section of the movable measuring rod (4); the rear end of the fixed measuring rod (3) is rigidly fixed to the side (2) of the support base (1) by a fixing screw (13); a hook point (7) is provided between the rear end of the movable measuring rod (4) and the intersection (15), and the hook point (7) is elastically connected to the upper side (2) of the support base (1) by a spring (8); the dial indicator (9) is fixed to the side (2) of the support base (1) by a meter holder (10), and the probe of the dial indicator (9) is vertically downward against the rod surface between the hook point (7) and the rear end of the movable measuring rod (4).

2. The mechanism for detecting an inner annular groove as described in claim 1, characterized in that: The fixed measuring rod (3) is a bent rod consisting of three sections. The first section (3-1) is in a horizontal position and extends out of the side (2) of the support base (1). The second section (3-2) is inclined to connect the first section (3-1) and the third section (3-3). The third section (3-3) is fixed to the side (2) of the support base (1) and is positioned lower than the first section (3-1). The measuring end (5) is located at the front end of the first section (3-1), the intersection (15) is located at the transition connection between the first section (3-1) and the second section (3-2), and the fixing screw (13) is located at the rear end of the third section (3-3).

3. The mechanism for detecting an inner annular groove as described in claim 1, characterized in that: The measuring end (5) is in point contact with the inner wall of the inner annular groove.

4. The mechanism for detecting an inner annular groove as described in claim 1, characterized in that: The measuring end (5) is a hook with the inner side vertical and the outer side inclined at (60) degrees.

5. The mechanism for detecting an inner annular groove as described in claim 1, characterized in that: The rear end of the movable lever (4) is provided with an opening adjustment mechanism.

6. The mechanism for detecting an inner annular groove as described in claim 5, characterized in that: The opening adjustment mechanism includes a pressure plate (11) and an adjusting screw (12). The pressure plate (11) is horizontally fixed on the support base (1). The pressure plate (11) extends out of the side (2) of the support base (1). The extended part is located above the movable measuring foot and has a vertical through threaded hole. The adjusting screw (12) is screwed into the threaded hole. The lower end of the adjusting screw (12) contacts the rod body of the movable measuring rod (4). The contact point is located between the position indicated by the probe of the dial indicator (9) and the rear end of the movable measuring rod (4).

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